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197e4fd60a2b-5 | messages: List[BaseMessage],
stop: Optional[List[str]] = None,
run_manager: Optional[CallbackManagerForLLMRun] = None,
stream: Optional[bool] = None,
**kwargs: Any,
) -> ChatResult:
should_stream = stream if stream is not None else self.streaming
if should_stream:
stream_iter = self._stream(
messages, stop=stop, run_manager=run_manager, **kwargs
)
return _generate_from_stream(stream_iter)
message_dicts, params = self._create_message_dicts(messages, stop)
params = {**params, **kwargs}
response = self.completion_with_retry(
messages=message_dicts, run_manager=run_manager, **params
)
return self._create_chat_result(response)
def _create_message_dicts(
self, messages: List[BaseMessage], stop: Optional[List[str]]
) -> Tuple[List[Dict[str, Any]], Dict[str, Any]]:
params = self._client_params
if stop is not None:
if "stop" in params:
raise ValueError("`stop` found in both the input and default params.")
params["stop"] = stop
message_dicts = [convert_message_to_dict(m) for m in messages]
return message_dicts, params
def _create_chat_result(self, response: Mapping[str, Any]) -> ChatResult:
generations = []
for res in response["choices"]:
message = convert_dict_to_message(res["message"])
gen = ChatGeneration(
message=message,
generation_info=dict(finish_reason=res.get("finish_reason")),
)
generations.append(gen)
token_usage = response.get("usage", {}) | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/konko.html |
197e4fd60a2b-6 | )
generations.append(gen)
token_usage = response.get("usage", {})
llm_output = {"token_usage": token_usage, "model_name": self.model}
return ChatResult(generations=generations, llm_output=llm_output)
@property
def _identifying_params(self) -> Dict[str, Any]:
"""Get the identifying parameters."""
return {**{"model_name": self.model}, **self._default_params}
@property
def _client_params(self) -> Dict[str, Any]:
"""Get the parameters used for the konko client."""
return {**self._default_params}
def _get_invocation_params(
self, stop: Optional[List[str]] = None, **kwargs: Any
) -> Dict[str, Any]:
"""Get the parameters used to invoke the model."""
return {
"model": self.model,
**super()._get_invocation_params(stop=stop),
**self._default_params,
**kwargs,
}
@property
def _llm_type(self) -> str:
"""Return type of chat model."""
return "konko-chat" | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/konko.html |
309bf2dbb34f-0 | Source code for langchain.chat_models.baidu_qianfan_endpoint
from __future__ import annotations
import logging
from typing import Any, AsyncIterator, Dict, Iterator, List, Mapping, Optional, cast
from langchain.callbacks.manager import (
AsyncCallbackManagerForLLMRun,
CallbackManagerForLLMRun,
)
from langchain.chat_models.base import BaseChatModel
from langchain.pydantic_v1 import Field, root_validator
from langchain.schema import ChatGeneration, ChatResult
from langchain.schema.messages import (
AIMessage,
AIMessageChunk,
BaseMessage,
ChatMessage,
FunctionMessage,
HumanMessage,
SystemMessage,
)
from langchain.schema.output import ChatGenerationChunk
from langchain.utils import get_from_dict_or_env
logger = logging.getLogger(__name__)
[docs]def convert_message_to_dict(message: BaseMessage) -> dict:
"""Convert a message to a dictionary that can be passed to the API."""
message_dict: Dict[str, Any]
if isinstance(message, ChatMessage):
message_dict = {"role": message.role, "content": message.content}
elif isinstance(message, HumanMessage):
message_dict = {"role": "user", "content": message.content}
elif isinstance(message, AIMessage):
message_dict = {"role": "assistant", "content": message.content}
if "function_call" in message.additional_kwargs:
message_dict["function_call"] = message.additional_kwargs["function_call"]
# If function call only, content is None not empty string
if message_dict["content"] == "":
message_dict["content"] = None
elif isinstance(message, FunctionMessage):
message_dict = {
"role": "function",
"content": message.content, | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/baidu_qianfan_endpoint.html |
309bf2dbb34f-1 | "role": "function",
"content": message.content,
"name": message.name,
}
else:
raise TypeError(f"Got unknown type {message}")
return message_dict
def _convert_dict_to_message(_dict: Mapping[str, Any]) -> AIMessage:
content = _dict.get("result", "") or ""
if _dict.get("function_call"):
additional_kwargs = {"function_call": dict(_dict["function_call"])}
if "thoughts" in additional_kwargs["function_call"]:
# align to api sample, which affects the llm function_call output
additional_kwargs["function_call"].pop("thoughts")
else:
additional_kwargs = {}
return AIMessage(
content=content,
additional_kwargs={**_dict.get("body", {}), **additional_kwargs},
)
[docs]class QianfanChatEndpoint(BaseChatModel):
"""Baidu Qianfan chat models.
To use, you should have the ``qianfan`` python package installed, and
the environment variable ``qianfan_ak`` and ``qianfan_sk`` set with your
API key and Secret Key.
ak, sk are required parameters
which you could get from https://cloud.baidu.com/product/wenxinworkshop
Example:
.. code-block:: python
from langchain.chat_models import QianfanChatEndpoint
qianfan_chat = QianfanChatEndpoint(model="ERNIE-Bot",
endpoint="your_endpoint", qianfan_ak="your_ak", qianfan_sk="your_sk")
"""
model_kwargs: Dict[str, Any] = Field(default_factory=dict)
client: Any
qianfan_ak: Optional[str] = None | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/baidu_qianfan_endpoint.html |
309bf2dbb34f-2 | client: Any
qianfan_ak: Optional[str] = None
qianfan_sk: Optional[str] = None
streaming: Optional[bool] = False
"""Whether to stream the results or not."""
request_timeout: Optional[int] = 60
"""request timeout for chat http requests"""
top_p: Optional[float] = 0.8
temperature: Optional[float] = 0.95
penalty_score: Optional[float] = 1
"""Model params, only supported in ERNIE-Bot and ERNIE-Bot-turbo.
In the case of other model, passing these params will not affect the result.
"""
model: str = "ERNIE-Bot-turbo"
"""Model name.
you could get from https://cloud.baidu.com/doc/WENXINWORKSHOP/s/Nlks5zkzu
preset models are mapping to an endpoint.
`model` will be ignored if `endpoint` is set.
Default is ERNIE-Bot-turbo.
"""
endpoint: Optional[str] = None
"""Endpoint of the Qianfan LLM, required if custom model used."""
@root_validator()
def validate_enviroment(cls, values: Dict) -> Dict:
values["qianfan_ak"] = get_from_dict_or_env(
values,
"qianfan_ak",
"QIANFAN_AK",
)
values["qianfan_sk"] = get_from_dict_or_env(
values,
"qianfan_sk",
"QIANFAN_SK",
)
params = {
"ak": values["qianfan_ak"], | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/baidu_qianfan_endpoint.html |
309bf2dbb34f-3 | )
params = {
"ak": values["qianfan_ak"],
"sk": values["qianfan_sk"],
"model": values["model"],
"stream": values["streaming"],
}
if values["endpoint"] is not None and values["endpoint"] != "":
params["endpoint"] = values["endpoint"]
try:
import qianfan
values["client"] = qianfan.ChatCompletion(**params)
except ImportError:
raise ValueError(
"qianfan package not found, please install it with "
"`pip install qianfan`"
)
return values
@property
def _identifying_params(self) -> Dict[str, Any]:
return {
**{"endpoint": self.endpoint, "model": self.model},
**super()._identifying_params,
}
@property
def _llm_type(self) -> str:
"""Return type of chat_model."""
return "baidu-qianfan-chat"
@property
def _default_params(self) -> Dict[str, Any]:
"""Get the default parameters for calling Qianfan API."""
normal_params = {
"model": self.model,
"endpoint": self.endpoint,
"stream": self.streaming,
"request_timeout": self.request_timeout,
"top_p": self.top_p,
"temperature": self.temperature,
"penalty_score": self.penalty_score,
}
return {**normal_params, **self.model_kwargs}
def _convert_prompt_msg_params(
self,
messages: List[BaseMessage],
**kwargs: Any,
) -> Dict[str, Any]:
""" | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/baidu_qianfan_endpoint.html |
309bf2dbb34f-4 | **kwargs: Any,
) -> Dict[str, Any]:
"""
Converts a list of messages into a dictionary containing the message content
and default parameters.
Args:
messages (List[BaseMessage]): The list of messages.
**kwargs (Any): Optional arguments to add additional parameters to the
resulting dictionary.
Returns:
Dict[str, Any]: A dictionary containing the message content and default
parameters.
"""
messages_dict: Dict[str, Any] = {
"messages": [
convert_message_to_dict(m)
for m in messages
if not isinstance(m, SystemMessage)
]
}
for i in [i for i, m in enumerate(messages) if isinstance(m, SystemMessage)]:
if "system" not in messages_dict:
messages_dict["system"] = ""
messages_dict["system"] += cast(str, messages[i].content) + "\n"
return {
**messages_dict,
**self._default_params,
**kwargs,
}
def _generate(
self,
messages: List[BaseMessage],
stop: Optional[List[str]] = None,
run_manager: Optional[CallbackManagerForLLMRun] = None,
**kwargs: Any,
) -> ChatResult:
"""Call out to an qianfan models endpoint for each generation with a prompt.
Args:
messages: The messages to pass into the model.
stop: Optional list of stop words to use when generating.
Returns:
The string generated by the model.
Example:
.. code-block:: python
response = qianfan_model("Tell me a joke.")
"""
if self.streaming: | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/baidu_qianfan_endpoint.html |
309bf2dbb34f-5 | """
if self.streaming:
completion = ""
for chunk in self._stream(messages, stop, run_manager, **kwargs):
completion += chunk.text
lc_msg = AIMessage(content=completion, additional_kwargs={})
gen = ChatGeneration(
message=lc_msg,
generation_info=dict(finish_reason="stop"),
)
return ChatResult(
generations=[gen],
llm_output={"token_usage": {}, "model_name": self.model},
)
params = self._convert_prompt_msg_params(messages, **kwargs)
response_payload = self.client.do(**params)
lc_msg = _convert_dict_to_message(response_payload)
gen = ChatGeneration(
message=lc_msg,
generation_info={
"finish_reason": "stop",
**response_payload.get("body", {}),
},
)
token_usage = response_payload.get("usage", {})
llm_output = {"token_usage": token_usage, "model_name": self.model}
return ChatResult(generations=[gen], llm_output=llm_output)
async def _agenerate(
self,
messages: List[BaseMessage],
stop: Optional[List[str]] = None,
run_manager: Optional[AsyncCallbackManagerForLLMRun] = None,
**kwargs: Any,
) -> ChatResult:
if self.streaming:
completion = ""
token_usage = {}
async for chunk in self._astream(messages, stop, run_manager, **kwargs):
completion += chunk.text
lc_msg = AIMessage(content=completion, additional_kwargs={})
gen = ChatGeneration(
message=lc_msg,
generation_info=dict(finish_reason="stop"),
) | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/baidu_qianfan_endpoint.html |
309bf2dbb34f-6 | generation_info=dict(finish_reason="stop"),
)
return ChatResult(
generations=[gen],
llm_output={"token_usage": {}, "model_name": self.model},
)
params = self._convert_prompt_msg_params(messages, **kwargs)
response_payload = await self.client.ado(**params)
lc_msg = _convert_dict_to_message(response_payload)
generations = []
gen = ChatGeneration(
message=lc_msg,
generation_info={
"finish_reason": "stop",
**response_payload.get("body", {}),
},
)
generations.append(gen)
token_usage = response_payload.get("usage", {})
llm_output = {"token_usage": token_usage, "model_name": self.model}
return ChatResult(generations=generations, llm_output=llm_output)
def _stream(
self,
messages: List[BaseMessage],
stop: Optional[List[str]] = None,
run_manager: Optional[CallbackManagerForLLMRun] = None,
**kwargs: Any,
) -> Iterator[ChatGenerationChunk]:
params = self._convert_prompt_msg_params(messages, **kwargs)
for res in self.client.do(**params):
if res:
msg = _convert_dict_to_message(res)
chunk = ChatGenerationChunk(
text=res["result"],
message=AIMessageChunk(
content=msg.content,
role="assistant",
additional_kwargs=msg.additional_kwargs,
),
)
yield chunk
if run_manager:
run_manager.on_llm_new_token(chunk.text, chunk=chunk)
async def _astream(
self,
messages: List[BaseMessage], | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/baidu_qianfan_endpoint.html |
309bf2dbb34f-7 | self,
messages: List[BaseMessage],
stop: Optional[List[str]] = None,
run_manager: Optional[AsyncCallbackManagerForLLMRun] = None,
**kwargs: Any,
) -> AsyncIterator[ChatGenerationChunk]:
params = self._convert_prompt_msg_params(messages, **kwargs)
async for res in await self.client.ado(**params):
if res:
msg = _convert_dict_to_message(res)
chunk = ChatGenerationChunk(
text=res["result"],
message=AIMessageChunk(
content=msg.content,
role="assistant",
additional_kwargs=msg.additional_kwargs,
),
)
yield chunk
if run_manager:
await run_manager.on_llm_new_token(chunk.text, chunk=chunk) | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/baidu_qianfan_endpoint.html |
11fba190c80c-0 | Source code for langchain.chat_models.javelin_ai_gateway
import logging
from typing import Any, Dict, List, Mapping, Optional, cast
from langchain.callbacks.manager import (
AsyncCallbackManagerForLLMRun,
CallbackManagerForLLMRun,
)
from langchain.chat_models.base import BaseChatModel
from langchain.pydantic_v1 import BaseModel, Extra, SecretStr
from langchain.schema import (
ChatGeneration,
ChatResult,
)
from langchain.schema.messages import (
AIMessage,
BaseMessage,
ChatMessage,
FunctionMessage,
HumanMessage,
SystemMessage,
)
logger = logging.getLogger(__name__)
# Ignoring type because below is valid pydantic code
# Unexpected keyword argument "extra" for "__init_subclass__" of "object" [call-arg]
[docs]class ChatParams(BaseModel, extra=Extra.allow): # type: ignore[call-arg]
"""Parameters for the `Javelin AI Gateway` LLM."""
temperature: float = 0.0
stop: Optional[List[str]] = None
max_tokens: Optional[int] = None
[docs]class ChatJavelinAIGateway(BaseChatModel):
"""`Javelin AI Gateway` chat models API.
To use, you should have the ``javelin_sdk`` python package installed.
For more information, see https://docs.getjavelin.io
Example:
.. code-block:: python
from langchain.chat_models import ChatJavelinAIGateway
chat = ChatJavelinAIGateway(
gateway_uri="<javelin-ai-gateway-uri>",
route="<javelin-ai-gateway-chat-route>",
params={ | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/javelin_ai_gateway.html |
11fba190c80c-1 | route="<javelin-ai-gateway-chat-route>",
params={
"temperature": 0.1
}
)
"""
route: str
"""The route to use for the Javelin AI Gateway API."""
gateway_uri: Optional[str] = None
"""The URI for the Javelin AI Gateway API."""
params: Optional[ChatParams] = None
"""Parameters for the Javelin AI Gateway LLM."""
client: Any
"""javelin client."""
javelin_api_key: Optional[SecretStr] = None
"""The API key for the Javelin AI Gateway."""
def __init__(self, **kwargs: Any):
try:
from javelin_sdk import (
JavelinClient,
UnauthorizedError,
)
except ImportError:
raise ImportError(
"Could not import javelin_sdk python package. "
"Please install it with `pip install javelin_sdk`."
)
super().__init__(**kwargs)
if self.gateway_uri:
try:
self.client = JavelinClient(
base_url=self.gateway_uri,
api_key=cast(SecretStr, self.javelin_api_key).get_secret_value(),
)
except UnauthorizedError as e:
raise ValueError("Javelin: Incorrect API Key.") from e
@property
def _default_params(self) -> Dict[str, Any]:
params: Dict[str, Any] = {
"gateway_uri": self.gateway_uri,
"javelin_api_key": cast(SecretStr, self.javelin_api_key).get_secret_value(),
"route": self.route,
**(self.params.dict() if self.params else {}), | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/javelin_ai_gateway.html |
11fba190c80c-2 | **(self.params.dict() if self.params else {}),
}
return params
def _generate(
self,
messages: List[BaseMessage],
stop: Optional[List[str]] = None,
run_manager: Optional[CallbackManagerForLLMRun] = None,
**kwargs: Any,
) -> ChatResult:
message_dicts = [
ChatJavelinAIGateway._convert_message_to_dict(message)
for message in messages
]
data: Dict[str, Any] = {
"messages": message_dicts,
**(self.params.dict() if self.params else {}),
}
resp = self.client.query_route(self.route, query_body=data)
return ChatJavelinAIGateway._create_chat_result(resp.dict())
async def _agenerate(
self,
messages: List[BaseMessage],
stop: Optional[List[str]] = None,
run_manager: Optional[AsyncCallbackManagerForLLMRun] = None,
**kwargs: Any,
) -> ChatResult:
message_dicts = [
ChatJavelinAIGateway._convert_message_to_dict(message)
for message in messages
]
data: Dict[str, Any] = {
"messages": message_dicts,
**(self.params.dict() if self.params else {}),
}
resp = await self.client.aquery_route(self.route, query_body=data)
return ChatJavelinAIGateway._create_chat_result(resp.dict())
@property
def _identifying_params(self) -> Dict[str, Any]:
return self._default_params
def _get_invocation_params(
self, stop: Optional[List[str]] = None, **kwargs: Any | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/javelin_ai_gateway.html |
11fba190c80c-3 | self, stop: Optional[List[str]] = None, **kwargs: Any
) -> Dict[str, Any]:
"""Get the parameters used to invoke the model FOR THE CALLBACKS."""
return {
**self._default_params,
**super()._get_invocation_params(stop=stop, **kwargs),
}
@property
def _llm_type(self) -> str:
"""Return type of chat model."""
return "javelin-ai-gateway-chat"
@staticmethod
def _convert_dict_to_message(_dict: Mapping[str, Any]) -> BaseMessage:
role = _dict["role"]
content = _dict["content"]
if role == "user":
return HumanMessage(content=content)
elif role == "assistant":
return AIMessage(content=content)
elif role == "system":
return SystemMessage(content=content)
else:
return ChatMessage(content=content, role=role)
@staticmethod
def _raise_functions_not_supported() -> None:
raise ValueError(
"Function messages are not supported by the Javelin AI Gateway. Please"
" create a feature request at https://docs.getjavelin.io"
)
@staticmethod
def _convert_message_to_dict(message: BaseMessage) -> dict:
if isinstance(message, ChatMessage):
message_dict = {"role": message.role, "content": message.content}
elif isinstance(message, HumanMessage):
message_dict = {"role": "user", "content": message.content}
elif isinstance(message, AIMessage):
message_dict = {"role": "assistant", "content": message.content}
elif isinstance(message, SystemMessage): | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/javelin_ai_gateway.html |
11fba190c80c-4 | elif isinstance(message, SystemMessage):
message_dict = {"role": "system", "content": message.content}
elif isinstance(message, FunctionMessage):
raise ValueError(
"Function messages are not supported by the Javelin AI Gateway. Please"
" create a feature request at https://docs.getjavelin.io"
)
else:
raise ValueError(f"Got unknown message type: {message}")
if "function_call" in message.additional_kwargs:
ChatJavelinAIGateway._raise_functions_not_supported()
if message.additional_kwargs:
logger.warning(
"Additional message arguments are unsupported by Javelin AI Gateway "
" and will be ignored: %s",
message.additional_kwargs,
)
return message_dict
@staticmethod
def _create_chat_result(response: Mapping[str, Any]) -> ChatResult:
generations = []
for candidate in response["llm_response"]["choices"]:
message = ChatJavelinAIGateway._convert_dict_to_message(
candidate["message"]
)
message_metadata = candidate.get("metadata", {})
gen = ChatGeneration(
message=message,
generation_info=dict(message_metadata),
)
generations.append(gen)
response_metadata = response.get("metadata", {})
return ChatResult(generations=generations, llm_output=response_metadata) | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/javelin_ai_gateway.html |
7fafb2f8847f-0 | Source code for langchain.chat_models.anyscale
"""Anyscale Endpoints chat wrapper. Relies heavily on ChatOpenAI."""
from __future__ import annotations
import logging
import os
import sys
from typing import TYPE_CHECKING, Dict, Optional, Set
import requests
from langchain.adapters.openai import convert_message_to_dict
from langchain.chat_models.openai import (
ChatOpenAI,
_import_tiktoken,
)
from langchain.pydantic_v1 import Field, SecretStr, root_validator
from langchain.schema.messages import BaseMessage
from langchain.utils import convert_to_secret_str, get_from_dict_or_env
from langchain.utils.openai import is_openai_v1
if TYPE_CHECKING:
import tiktoken
logger = logging.getLogger(__name__)
DEFAULT_API_BASE = "https://api.endpoints.anyscale.com/v1"
DEFAULT_MODEL = "meta-llama/Llama-2-7b-chat-hf"
[docs]class ChatAnyscale(ChatOpenAI):
"""`Anyscale` Chat large language models.
See https://www.anyscale.com/ for information about Anyscale.
To use, you should have the ``openai`` python package installed, and the
environment variable ``ANYSCALE_API_KEY`` set with your API key.
Alternatively, you can use the anyscale_api_key keyword argument.
Any parameters that are valid to be passed to the `openai.create` call can be passed
in, even if not explicitly saved on this class.
Example:
.. code-block:: python
from langchain.chat_models import ChatAnyscale
chat = ChatAnyscale(model_name="meta-llama/Llama-2-7b-chat-hf")
"""
@property
def _llm_type(self) -> str: | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/anyscale.html |
7fafb2f8847f-1 | """
@property
def _llm_type(self) -> str:
"""Return type of chat model."""
return "anyscale-chat"
@property
def lc_secrets(self) -> Dict[str, str]:
return {"anyscale_api_key": "ANYSCALE_API_KEY"}
anyscale_api_key: SecretStr
"""AnyScale Endpoints API keys."""
model_name: str = Field(default=DEFAULT_MODEL, alias="model")
"""Model name to use."""
anyscale_api_base: str = Field(default=DEFAULT_API_BASE)
"""Base URL path for API requests,
leave blank if not using a proxy or service emulator."""
anyscale_proxy: Optional[str] = None
"""To support explicit proxy for Anyscale."""
available_models: Optional[Set[str]] = None
"""Available models from Anyscale API."""
[docs] @staticmethod
def get_available_models(
anyscale_api_key: Optional[str] = None,
anyscale_api_base: str = DEFAULT_API_BASE,
) -> Set[str]:
"""Get available models from Anyscale API."""
try:
anyscale_api_key = anyscale_api_key or os.environ["ANYSCALE_API_KEY"]
except KeyError as e:
raise ValueError(
"Anyscale API key must be passed as keyword argument or "
"set in environment variable ANYSCALE_API_KEY.",
) from e
models_url = f"{anyscale_api_base}/models"
models_response = requests.get(
models_url,
headers={
"Authorization": f"Bearer {anyscale_api_key}",
},
)
if models_response.status_code != 200:
raise ValueError( | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/anyscale.html |
7fafb2f8847f-2 | )
if models_response.status_code != 200:
raise ValueError(
f"Error getting models from {models_url}: "
f"{models_response.status_code}",
)
return {model["id"] for model in models_response.json()["data"]}
@root_validator(pre=True)
def validate_environment_override(cls, values: dict) -> dict:
"""Validate that api key and python package exists in environment."""
values["openai_api_key"] = get_from_dict_or_env(
values,
"anyscale_api_key",
"ANYSCALE_API_KEY",
)
values["anyscale_api_key"] = convert_to_secret_str(
get_from_dict_or_env(
values,
"anyscale_api_key",
"ANYSCALE_API_KEY",
)
)
values["openai_api_base"] = get_from_dict_or_env(
values,
"anyscale_api_base",
"ANYSCALE_API_BASE",
default=DEFAULT_API_BASE,
)
values["openai_proxy"] = get_from_dict_or_env(
values,
"anyscale_proxy",
"ANYSCALE_PROXY",
default="",
)
try:
import openai
except ImportError as e:
raise ValueError(
"Could not import openai python package. "
"Please install it with `pip install openai`.",
) from e
try:
if is_openai_v1():
client_params = {
"api_key": values["openai_api_key"],
"base_url": values["openai_api_base"],
# To do: future support
# "organization": values["openai_organization"], | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/anyscale.html |
7fafb2f8847f-3 | # To do: future support
# "organization": values["openai_organization"],
# "timeout": values["request_timeout"],
# "max_retries": values["max_retries"],
# "default_headers": values["default_headers"],
# "default_query": values["default_query"],
# "http_client": values["http_client"],
}
values["client"] = openai.OpenAI(**client_params).chat.completions
else:
values["client"] = openai.ChatCompletion
except AttributeError as exc:
raise ValueError(
"`openai` has no `ChatCompletion` attribute, this is likely "
"due to an old version of the openai package. Try upgrading it "
"with `pip install --upgrade openai`.",
) from exc
if "model_name" not in values.keys():
values["model_name"] = DEFAULT_MODEL
model_name = values["model_name"]
available_models = cls.get_available_models(
values["openai_api_key"],
values["openai_api_base"],
)
if model_name not in available_models:
raise ValueError(
f"Model name {model_name} not found in available models: "
f"{available_models}.",
)
values["available_models"] = available_models
return values
def _get_encoding_model(self) -> tuple[str, tiktoken.Encoding]:
tiktoken_ = _import_tiktoken()
if self.tiktoken_model_name is not None:
model = self.tiktoken_model_name
else:
model = self.model_name
# Returns the number of tokens used by a list of messages.
try: | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/anyscale.html |
7fafb2f8847f-4 | # Returns the number of tokens used by a list of messages.
try:
encoding = tiktoken_.encoding_for_model("gpt-3.5-turbo-0301")
except KeyError:
logger.warning("Warning: model not found. Using cl100k_base encoding.")
model = "cl100k_base"
encoding = tiktoken_.get_encoding(model)
return model, encoding
[docs] def get_num_tokens_from_messages(self, messages: list[BaseMessage]) -> int:
"""Calculate num tokens with tiktoken package.
Official documentation: https://github.com/openai/openai-cookbook/blob/
main/examples/How_to_format_inputs_to_ChatGPT_models.ipynb"""
if sys.version_info[1] <= 7:
return super().get_num_tokens_from_messages(messages)
model, encoding = self._get_encoding_model()
tokens_per_message = 3
tokens_per_name = 1
num_tokens = 0
messages_dict = [convert_message_to_dict(m) for m in messages]
for message in messages_dict:
num_tokens += tokens_per_message
for key, value in message.items():
# Cast str(value) in case the message value is not a string
# This occurs with function messages
num_tokens += len(encoding.encode(str(value)))
if key == "name":
num_tokens += tokens_per_name
# every reply is primed with <im_start>assistant
num_tokens += 3
return num_tokens | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/anyscale.html |
e621296ae8ed-0 | Source code for langchain.chat_models.cohere
from typing import Any, AsyncIterator, Dict, Iterator, List, Optional
from langchain.callbacks.manager import (
AsyncCallbackManagerForLLMRun,
CallbackManagerForLLMRun,
)
from langchain.chat_models.base import (
BaseChatModel,
_agenerate_from_stream,
_generate_from_stream,
)
from langchain.llms.cohere import BaseCohere
from langchain.schema.messages import (
AIMessage,
AIMessageChunk,
BaseMessage,
ChatMessage,
HumanMessage,
SystemMessage,
)
from langchain.schema.output import ChatGeneration, ChatGenerationChunk, ChatResult
[docs]def get_role(message: BaseMessage) -> str:
"""Get the role of the message.
Args:
message: The message.
Returns:
The role of the message.
Raises:
ValueError: If the message is of an unknown type.
"""
if isinstance(message, ChatMessage) or isinstance(message, HumanMessage):
return "User"
elif isinstance(message, AIMessage):
return "Chatbot"
elif isinstance(message, SystemMessage):
return "System"
else:
raise ValueError(f"Got unknown type {message}")
[docs]def get_cohere_chat_request(
messages: List[BaseMessage],
*,
connectors: Optional[List[Dict[str, str]]] = None,
**kwargs: Any,
) -> Dict[str, Any]:
"""Get the request for the Cohere chat API.
Args:
messages: The messages.
connectors: The connectors.
**kwargs: The keyword arguments.
Returns: | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/cohere.html |
e621296ae8ed-1 | connectors: The connectors.
**kwargs: The keyword arguments.
Returns:
The request for the Cohere chat API.
"""
documents = (
None
if "source_documents" not in kwargs
else [
{
"snippet": doc.page_content,
"id": doc.metadata.get("id") or f"doc-{str(i)}",
}
for i, doc in enumerate(kwargs["source_documents"])
]
)
kwargs.pop("source_documents", None)
maybe_connectors = connectors if documents is None else None
# by enabling automatic prompt truncation, the probability of request failure is
# reduced with minimal impact on response quality
prompt_truncation = (
"AUTO" if documents is not None or connectors is not None else None
)
return {
"message": messages[-1].content,
"chat_history": [
{"role": get_role(x), "message": x.content} for x in messages[:-1]
],
"documents": documents,
"connectors": maybe_connectors,
"prompt_truncation": prompt_truncation,
**kwargs,
}
[docs]class ChatCohere(BaseChatModel, BaseCohere):
"""`Cohere` chat large language models.
To use, you should have the ``cohere`` python package installed, and the
environment variable ``COHERE_API_KEY`` set with your API key, or pass
it as a named parameter to the constructor.
Example:
.. code-block:: python
from langchain.chat_models import ChatCohere
from langchain.schema import HumanMessage
chat = ChatCohere(model="foo") | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/cohere.html |
e621296ae8ed-2 | chat = ChatCohere(model="foo")
result = chat([HumanMessage(content="Hello")])
print(result.content)
"""
class Config:
"""Configuration for this pydantic object."""
allow_population_by_field_name = True
arbitrary_types_allowed = True
@property
def _llm_type(self) -> str:
"""Return type of chat model."""
return "cohere-chat"
@property
def _default_params(self) -> Dict[str, Any]:
"""Get the default parameters for calling Cohere API."""
return {
"temperature": self.temperature,
}
@property
def _identifying_params(self) -> Dict[str, Any]:
"""Get the identifying parameters."""
return {**{"model": self.model}, **self._default_params}
def _stream(
self,
messages: List[BaseMessage],
stop: Optional[List[str]] = None,
run_manager: Optional[CallbackManagerForLLMRun] = None,
**kwargs: Any,
) -> Iterator[ChatGenerationChunk]:
request = get_cohere_chat_request(messages, **self._default_params, **kwargs)
stream = self.client.chat(**request, stream=True)
for data in stream:
if data.event_type == "text-generation":
delta = data.text
yield ChatGenerationChunk(message=AIMessageChunk(content=delta))
if run_manager:
run_manager.on_llm_new_token(delta)
async def _astream(
self,
messages: List[BaseMessage],
stop: Optional[List[str]] = None,
run_manager: Optional[AsyncCallbackManagerForLLMRun] = None,
**kwargs: Any, | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/cohere.html |
e621296ae8ed-3 | **kwargs: Any,
) -> AsyncIterator[ChatGenerationChunk]:
request = get_cohere_chat_request(messages, **self._default_params, **kwargs)
stream = await self.async_client.chat(**request, stream=True)
async for data in stream:
if data.event_type == "text-generation":
delta = data.text
yield ChatGenerationChunk(message=AIMessageChunk(content=delta))
if run_manager:
await run_manager.on_llm_new_token(delta)
def _get_generation_info(self, response: Any) -> Dict[str, Any]:
"""Get the generation info from cohere API response."""
return {
"documents": response.documents,
"citations": response.citations,
"search_results": response.search_results,
"search_queries": response.search_queries,
"token_count": response.token_count,
}
def _generate(
self,
messages: List[BaseMessage],
stop: Optional[List[str]] = None,
run_manager: Optional[CallbackManagerForLLMRun] = None,
**kwargs: Any,
) -> ChatResult:
if self.streaming:
stream_iter = self._stream(
messages, stop=stop, run_manager=run_manager, **kwargs
)
return _generate_from_stream(stream_iter)
request = get_cohere_chat_request(messages, **self._default_params, **kwargs)
response = self.client.chat(**request)
message = AIMessage(content=response.text)
generation_info = None
if hasattr(response, "documents"):
generation_info = self._get_generation_info(response)
return ChatResult(
generations=[
ChatGeneration(message=message, generation_info=generation_info)
] | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/cohere.html |
e621296ae8ed-4 | generations=[
ChatGeneration(message=message, generation_info=generation_info)
]
)
async def _agenerate(
self,
messages: List[BaseMessage],
stop: Optional[List[str]] = None,
run_manager: Optional[AsyncCallbackManagerForLLMRun] = None,
**kwargs: Any,
) -> ChatResult:
if self.streaming:
stream_iter = self._astream(
messages, stop=stop, run_manager=run_manager, **kwargs
)
return await _agenerate_from_stream(stream_iter)
request = get_cohere_chat_request(messages, **self._default_params, **kwargs)
response = self.client.chat(**request, stream=False)
message = AIMessage(content=response.text)
generation_info = None
if hasattr(response, "documents"):
generation_info = self._get_generation_info(response)
return ChatResult(
generations=[
ChatGeneration(message=message, generation_info=generation_info)
]
)
[docs] def get_num_tokens(self, text: str) -> int:
"""Calculate number of tokens."""
return len(self.client.tokenize(text).tokens) | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/cohere.html |
ea396b6363eb-0 | Source code for langchain.chat_models.human
"""ChatModel wrapper which returns user input as the response.."""
import asyncio
from functools import partial
from io import StringIO
from typing import Any, Callable, Dict, List, Mapping, Optional
import yaml
from langchain.callbacks.manager import (
AsyncCallbackManagerForLLMRun,
CallbackManagerForLLMRun,
)
from langchain.chat_models.base import BaseChatModel
from langchain.llms.utils import enforce_stop_tokens
from langchain.pydantic_v1 import Field
from langchain.schema.messages import (
BaseMessage,
HumanMessage,
_message_from_dict,
messages_to_dict,
)
from langchain.schema.output import ChatGeneration, ChatResult
def _display_messages(messages: List[BaseMessage]) -> None:
dict_messages = messages_to_dict(messages)
for message in dict_messages:
yaml_string = yaml.dump(
message,
default_flow_style=False,
sort_keys=False,
allow_unicode=True,
width=10000,
line_break=None,
)
print("\n", "======= start of message =======", "\n\n")
print(yaml_string)
print("======= end of message =======", "\n\n")
def _collect_yaml_input(
messages: List[BaseMessage], stop: Optional[List[str]] = None
) -> BaseMessage:
"""Collects and returns user input as a single string."""
lines = []
while True:
line = input()
if not line.strip():
break
if stop and any(seq in line for seq in stop):
break
lines.append(line)
yaml_string = "\n".join(lines)
# Try to parse the input string as YAML
try: | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/human.html |
ea396b6363eb-1 | # Try to parse the input string as YAML
try:
message = _message_from_dict(yaml.safe_load(StringIO(yaml_string)))
if message is None:
return HumanMessage(content="")
if stop:
if isinstance(message.content, str):
message.content = enforce_stop_tokens(message.content, stop)
else:
raise ValueError("Cannot use when output is not a string.")
return message
except yaml.YAMLError:
raise ValueError("Invalid YAML string entered.")
except ValueError:
raise ValueError("Invalid message entered.")
[docs]class HumanInputChatModel(BaseChatModel):
"""ChatModel which returns user input as the response."""
input_func: Callable = Field(default_factory=lambda: _collect_yaml_input)
message_func: Callable = Field(default_factory=lambda: _display_messages)
separator: str = "\n"
input_kwargs: Mapping[str, Any] = {}
message_kwargs: Mapping[str, Any] = {}
@property
def _identifying_params(self) -> Dict[str, Any]:
return {
"input_func": self.input_func.__name__,
"message_func": self.message_func.__name__,
}
@property
def _llm_type(self) -> str:
"""Returns the type of LLM."""
return "human-input-chat-model"
def _generate(
self,
messages: List[BaseMessage],
stop: Optional[List[str]] = None,
run_manager: Optional[CallbackManagerForLLMRun] = None,
**kwargs: Any,
) -> ChatResult:
"""
Displays the messages to the user and returns their input as a response.
Args: | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/human.html |
ea396b6363eb-2 | Displays the messages to the user and returns their input as a response.
Args:
messages (List[BaseMessage]): The messages to be displayed to the user.
stop (Optional[List[str]]): A list of stop strings.
run_manager (Optional[CallbackManagerForLLMRun]): Currently not used.
Returns:
ChatResult: The user's input as a response.
"""
self.message_func(messages, **self.message_kwargs)
user_input = self.input_func(messages, stop=stop, **self.input_kwargs)
return ChatResult(generations=[ChatGeneration(message=user_input)])
async def _agenerate(
self,
messages: List[BaseMessage],
stop: Optional[List[str]] = None,
run_manager: Optional[AsyncCallbackManagerForLLMRun] = None,
**kwargs: Any,
) -> ChatResult:
func = partial(
self._generate, messages, stop=stop, run_manager=run_manager, **kwargs
)
return await asyncio.get_event_loop().run_in_executor(None, func) | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/human.html |
f9b060e84a7f-0 | Source code for langchain.chat_models.fireworks
from typing import (
Any,
AsyncIterator,
Callable,
Dict,
Iterator,
List,
Optional,
Type,
Union,
)
from langchain.adapters.openai import convert_message_to_dict
from langchain.callbacks.manager import (
AsyncCallbackManagerForLLMRun,
CallbackManagerForLLMRun,
)
from langchain.chat_models.base import BaseChatModel
from langchain.llms.base import create_base_retry_decorator
from langchain.pydantic_v1 import Field, SecretStr, root_validator
from langchain.schema.messages import (
AIMessage,
AIMessageChunk,
BaseMessage,
BaseMessageChunk,
ChatMessage,
ChatMessageChunk,
FunctionMessage,
FunctionMessageChunk,
HumanMessage,
HumanMessageChunk,
SystemMessage,
SystemMessageChunk,
)
from langchain.schema.output import ChatGeneration, ChatGenerationChunk, ChatResult
from langchain.utils import convert_to_secret_str
from langchain.utils.env import get_from_dict_or_env
def _convert_delta_to_message_chunk(
_dict: Any, default_class: Type[BaseMessageChunk]
) -> BaseMessageChunk:
"""Convert a delta response to a message chunk."""
role = _dict.role
content = _dict.content or ""
additional_kwargs: Dict = {}
if role == "user" or default_class == HumanMessageChunk:
return HumanMessageChunk(content=content)
elif role == "assistant" or default_class == AIMessageChunk:
return AIMessageChunk(content=content, additional_kwargs=additional_kwargs)
elif role == "system" or default_class == SystemMessageChunk:
return SystemMessageChunk(content=content) | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/fireworks.html |
f9b060e84a7f-1 | return SystemMessageChunk(content=content)
elif role == "function" or default_class == FunctionMessageChunk:
return FunctionMessageChunk(content=content, name=_dict.name)
elif role or default_class == ChatMessageChunk:
return ChatMessageChunk(content=content, role=role)
else:
return default_class(content=content)
[docs]def convert_dict_to_message(_dict: Any) -> BaseMessage:
"""Convert a dict response to a message."""
role = _dict.role
content = _dict.content or ""
if role == "user":
return HumanMessage(content=content)
elif role == "assistant":
content = _dict.content
additional_kwargs: Dict = {}
return AIMessage(content=content, additional_kwargs=additional_kwargs)
elif role == "system":
return SystemMessage(content=content)
elif role == "function":
return FunctionMessage(content=content, name=_dict.name)
else:
return ChatMessage(content=content, role=role)
[docs]class ChatFireworks(BaseChatModel):
"""Fireworks Chat models."""
model: str = "accounts/fireworks/models/llama-v2-7b-chat"
model_kwargs: dict = Field(
default_factory=lambda: {
"temperature": 0.7,
"max_tokens": 512,
"top_p": 1,
}.copy()
)
fireworks_api_key: Optional[SecretStr] = None
max_retries: int = 20
use_retry: bool = True
@property
def lc_secrets(self) -> Dict[str, str]:
return {"fireworks_api_key": "FIREWORKS_API_KEY"} | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/fireworks.html |
f9b060e84a7f-2 | return {"fireworks_api_key": "FIREWORKS_API_KEY"}
[docs] @classmethod
def is_lc_serializable(cls) -> bool:
return True
@root_validator()
def validate_environment(cls, values: Dict) -> Dict:
"""Validate that api key in environment."""
try:
import fireworks.client
except ImportError as e:
raise ImportError(
"Could not import fireworks-ai python package. "
"Please install it with `pip install fireworks-ai`."
) from e
fireworks_api_key = convert_to_secret_str(
get_from_dict_or_env(values, "fireworks_api_key", "FIREWORKS_API_KEY")
)
fireworks.client.api_key = fireworks_api_key.get_secret_value()
return values
@property
def _llm_type(self) -> str:
"""Return type of llm."""
return "fireworks-chat"
def _generate(
self,
messages: List[BaseMessage],
stop: Optional[List[str]] = None,
run_manager: Optional[CallbackManagerForLLMRun] = None,
**kwargs: Any,
) -> ChatResult:
message_dicts = self._create_message_dicts(messages)
params = {
"model": self.model,
"messages": message_dicts,
**self.model_kwargs,
}
response = completion_with_retry(
self,
self.use_retry,
run_manager=run_manager,
stop=stop,
**params,
)
return self._create_chat_result(response)
async def _agenerate(
self,
messages: List[BaseMessage],
stop: Optional[List[str]] = None, | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/fireworks.html |
f9b060e84a7f-3 | messages: List[BaseMessage],
stop: Optional[List[str]] = None,
run_manager: Optional[AsyncCallbackManagerForLLMRun] = None,
**kwargs: Any,
) -> ChatResult:
message_dicts = self._create_message_dicts(messages)
params = {
"model": self.model,
"messages": message_dicts,
**self.model_kwargs,
}
response = await acompletion_with_retry(
self, self.use_retry, run_manager=run_manager, stop=stop, **params
)
return self._create_chat_result(response)
def _combine_llm_outputs(self, llm_outputs: List[Optional[dict]]) -> dict:
if llm_outputs[0] is None:
return {}
return llm_outputs[0]
def _create_chat_result(self, response: Any) -> ChatResult:
generations = []
for res in response.choices:
message = convert_dict_to_message(res.message)
gen = ChatGeneration(
message=message,
generation_info=dict(finish_reason=res.finish_reason),
)
generations.append(gen)
llm_output = {"model": self.model}
return ChatResult(generations=generations, llm_output=llm_output)
def _create_message_dicts(
self, messages: List[BaseMessage]
) -> List[Dict[str, Any]]:
message_dicts = [convert_message_to_dict(m) for m in messages]
return message_dicts
def _stream(
self,
messages: List[BaseMessage],
stop: Optional[List[str]] = None,
run_manager: Optional[CallbackManagerForLLMRun] = None,
**kwargs: Any, | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/fireworks.html |
f9b060e84a7f-4 | **kwargs: Any,
) -> Iterator[ChatGenerationChunk]:
message_dicts = self._create_message_dicts(messages)
default_chunk_class = AIMessageChunk
params = {
"model": self.model,
"messages": message_dicts,
"stream": True,
**self.model_kwargs,
}
for chunk in completion_with_retry(
self, self.use_retry, run_manager=run_manager, stop=stop, **params
):
choice = chunk.choices[0]
chunk = _convert_delta_to_message_chunk(choice.delta, default_chunk_class)
finish_reason = choice.finish_reason
generation_info = (
dict(finish_reason=finish_reason) if finish_reason is not None else None
)
default_chunk_class = chunk.__class__
chunk = ChatGenerationChunk(message=chunk, generation_info=generation_info)
yield chunk
if run_manager:
run_manager.on_llm_new_token(chunk.text, chunk=chunk)
async def _astream(
self,
messages: List[BaseMessage],
stop: Optional[List[str]] = None,
run_manager: Optional[AsyncCallbackManagerForLLMRun] = None,
**kwargs: Any,
) -> AsyncIterator[ChatGenerationChunk]:
message_dicts = self._create_message_dicts(messages)
default_chunk_class = AIMessageChunk
params = {
"model": self.model,
"messages": message_dicts,
"stream": True,
**self.model_kwargs,
}
async for chunk in await acompletion_with_retry_streaming(
self, self.use_retry, run_manager=run_manager, stop=stop, **params
):
choice = chunk.choices[0] | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/fireworks.html |
f9b060e84a7f-5 | ):
choice = chunk.choices[0]
chunk = _convert_delta_to_message_chunk(choice.delta, default_chunk_class)
finish_reason = choice.finish_reason
generation_info = (
dict(finish_reason=finish_reason) if finish_reason is not None else None
)
default_chunk_class = chunk.__class__
chunk = ChatGenerationChunk(message=chunk, generation_info=generation_info)
yield chunk
if run_manager:
await run_manager.on_llm_new_token(token=chunk.text, chunk=chunk)
[docs]def conditional_decorator(
condition: bool, decorator: Callable[[Any], Any]
) -> Callable[[Any], Any]:
def actual_decorator(func: Callable[[Any], Any]) -> Callable[[Any], Any]:
if condition:
return decorator(func)
return func
return actual_decorator
[docs]def completion_with_retry(
llm: ChatFireworks,
use_retry: bool,
*,
run_manager: Optional[CallbackManagerForLLMRun] = None,
**kwargs: Any,
) -> Any:
"""Use tenacity to retry the completion call."""
import fireworks.client
retry_decorator = _create_retry_decorator(llm, run_manager=run_manager)
@conditional_decorator(use_retry, retry_decorator)
def _completion_with_retry(**kwargs: Any) -> Any:
return fireworks.client.ChatCompletion.create(
**kwargs,
)
return _completion_with_retry(**kwargs)
[docs]async def acompletion_with_retry(
llm: ChatFireworks,
use_retry: bool,
*,
run_manager: Optional[AsyncCallbackManagerForLLMRun] = None,
**kwargs: Any,
) -> Any: | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/fireworks.html |
f9b060e84a7f-6 | **kwargs: Any,
) -> Any:
"""Use tenacity to retry the async completion call."""
import fireworks.client
retry_decorator = _create_retry_decorator(llm, run_manager=run_manager)
@conditional_decorator(use_retry, retry_decorator)
async def _completion_with_retry(**kwargs: Any) -> Any:
return await fireworks.client.ChatCompletion.acreate(
**kwargs,
)
return await _completion_with_retry(**kwargs)
[docs]async def acompletion_with_retry_streaming(
llm: ChatFireworks,
use_retry: bool,
*,
run_manager: Optional[AsyncCallbackManagerForLLMRun] = None,
**kwargs: Any,
) -> Any:
"""Use tenacity to retry the completion call for streaming."""
import fireworks.client
retry_decorator = _create_retry_decorator(llm, run_manager=run_manager)
@conditional_decorator(use_retry, retry_decorator)
async def _completion_with_retry(**kwargs: Any) -> Any:
return fireworks.client.ChatCompletion.acreate(
**kwargs,
)
return await _completion_with_retry(**kwargs)
def _create_retry_decorator(
llm: ChatFireworks,
run_manager: Optional[
Union[AsyncCallbackManagerForLLMRun, CallbackManagerForLLMRun]
] = None,
) -> Callable[[Any], Any]:
"""Define retry mechanism."""
import fireworks.client
errors = [
fireworks.client.error.RateLimitError,
fireworks.client.error.InternalServerError,
fireworks.client.error.BadGatewayError,
fireworks.client.error.ServiceUnavailableError,
]
return create_base_retry_decorator( | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/fireworks.html |
f9b060e84a7f-7 | fireworks.client.error.ServiceUnavailableError,
]
return create_base_retry_decorator(
error_types=errors, max_retries=llm.max_retries, run_manager=run_manager
) | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/fireworks.html |
bc9525303fdf-0 | Source code for langchain.chat_models.hunyuan
import base64
import hashlib
import hmac
import json
import logging
import time
from typing import Any, Dict, Iterator, List, Mapping, Optional, Type
from urllib.parse import urlparse
import requests
from langchain.callbacks.manager import CallbackManagerForLLMRun
from langchain.chat_models.base import BaseChatModel, _generate_from_stream
from langchain.pydantic_v1 import Field, SecretStr, root_validator
from langchain.schema import (
AIMessage,
BaseMessage,
ChatGeneration,
ChatMessage,
ChatResult,
HumanMessage,
)
from langchain.schema.messages import (
AIMessageChunk,
BaseMessageChunk,
ChatMessageChunk,
HumanMessageChunk,
)
from langchain.schema.output import ChatGenerationChunk
from langchain.utils import (
convert_to_secret_str,
get_from_dict_or_env,
get_pydantic_field_names,
)
logger = logging.getLogger(__name__)
DEFAULT_API_BASE = "https://hunyuan.cloud.tencent.com"
DEFAULT_PATH = "/hyllm/v1/chat/completions"
def _convert_message_to_dict(message: BaseMessage) -> dict:
message_dict: Dict[str, Any]
if isinstance(message, ChatMessage):
message_dict = {"role": message.role, "content": message.content}
elif isinstance(message, HumanMessage):
message_dict = {"role": "user", "content": message.content}
elif isinstance(message, AIMessage):
message_dict = {"role": "assistant", "content": message.content}
else:
raise TypeError(f"Got unknown type {message}")
return message_dict
def _convert_dict_to_message(_dict: Mapping[str, Any]) -> BaseMessage: | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/hunyuan.html |
bc9525303fdf-1 | def _convert_dict_to_message(_dict: Mapping[str, Any]) -> BaseMessage:
role = _dict["role"]
if role == "user":
return HumanMessage(content=_dict["content"])
elif role == "assistant":
return AIMessage(content=_dict.get("content", "") or "")
else:
return ChatMessage(content=_dict["content"], role=role)
def _convert_delta_to_message_chunk(
_dict: Mapping[str, Any], default_class: Type[BaseMessageChunk]
) -> BaseMessageChunk:
role = _dict.get("role")
content = _dict.get("content") or ""
if role == "user" or default_class == HumanMessageChunk:
return HumanMessageChunk(content=content)
elif role == "assistant" or default_class == AIMessageChunk:
return AIMessageChunk(content=content)
elif role or default_class == ChatMessageChunk:
return ChatMessageChunk(content=content, role=role)
else:
return default_class(content=content)
# signature generation
# https://cloud.tencent.com/document/product/1729/97732#532252ce-e960-48a7-8821-940a9ce2ccf3
def _signature(secret_key: SecretStr, url: str, payload: Dict[str, Any]) -> str:
sorted_keys = sorted(payload.keys())
url_info = urlparse(url)
sign_str = url_info.netloc + url_info.path + "?"
for key in sorted_keys:
value = payload[key]
if isinstance(value, list) or isinstance(value, dict):
value = json.dumps(value, separators=(",", ":"))
elif isinstance(value, float):
value = "%g" % value | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/hunyuan.html |
bc9525303fdf-2 | elif isinstance(value, float):
value = "%g" % value
sign_str = sign_str + key + "=" + str(value) + "&"
sign_str = sign_str[:-1]
hmacstr = hmac.new(
key=secret_key.get_secret_value().encode("utf-8"),
msg=sign_str.encode("utf-8"),
digestmod=hashlib.sha1,
).digest()
return base64.b64encode(hmacstr).decode("utf-8")
def _create_chat_result(response: Mapping[str, Any]) -> ChatResult:
generations = []
for choice in response["choices"]:
message = _convert_dict_to_message(choice["messages"])
generations.append(ChatGeneration(message=message))
token_usage = response["usage"]
llm_output = {"token_usage": token_usage}
return ChatResult(generations=generations, llm_output=llm_output)
[docs]class ChatHunyuan(BaseChatModel):
"""Tencent Hunyuan chat models API by Tencent.
For more information, see https://cloud.tencent.com/document/product/1729
"""
@property
def lc_secrets(self) -> Dict[str, str]:
return {
"hunyuan_app_id": "HUNYUAN_APP_ID",
"hunyuan_secret_id": "HUNYUAN_SECRET_ID",
"hunyuan_secret_key": "HUNYUAN_SECRET_KEY",
}
@property
def lc_serializable(self) -> bool:
return True
hunyuan_api_base: str = Field(default=DEFAULT_API_BASE)
"""Hunyuan custom endpoints"""
hunyuan_app_id: Optional[str] = None | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/hunyuan.html |
bc9525303fdf-3 | hunyuan_app_id: Optional[str] = None
"""Hunyuan App ID"""
hunyuan_secret_id: Optional[str] = None
"""Hunyuan Secret ID"""
hunyuan_secret_key: Optional[SecretStr] = None
"""Hunyuan Secret Key"""
streaming: bool = False
"""Whether to stream the results or not."""
request_timeout: int = 60
"""Timeout for requests to Hunyuan API. Default is 60 seconds."""
query_id: Optional[str] = None
"""Query id for troubleshooting"""
temperature: float = 1.0
"""What sampling temperature to use."""
top_p: float = 1.0
"""What probability mass to use."""
model_kwargs: Dict[str, Any] = Field(default_factory=dict)
"""Holds any model parameters valid for API call not explicitly specified."""
class Config:
"""Configuration for this pydantic object."""
allow_population_by_field_name = True
@root_validator(pre=True)
def build_extra(cls, values: Dict[str, Any]) -> Dict[str, Any]:
"""Build extra kwargs from additional params that were passed in."""
all_required_field_names = get_pydantic_field_names(cls)
extra = values.get("model_kwargs", {})
for field_name in list(values):
if field_name in extra:
raise ValueError(f"Found {field_name} supplied twice.")
if field_name not in all_required_field_names:
logger.warning(
f"""WARNING! {field_name} is not default parameter.
{field_name} was transferred to model_kwargs.
Please confirm that {field_name} is what you intended."""
) | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/hunyuan.html |
bc9525303fdf-4 | Please confirm that {field_name} is what you intended."""
)
extra[field_name] = values.pop(field_name)
invalid_model_kwargs = all_required_field_names.intersection(extra.keys())
if invalid_model_kwargs:
raise ValueError(
f"Parameters {invalid_model_kwargs} should be specified explicitly. "
f"Instead they were passed in as part of `model_kwargs` parameter."
)
values["model_kwargs"] = extra
return values
@root_validator()
def validate_environment(cls, values: Dict) -> Dict:
values["hunyuan_api_base"] = get_from_dict_or_env(
values,
"hunyuan_api_base",
"HUNYUAN_API_BASE",
DEFAULT_API_BASE,
)
values["hunyuan_app_id"] = get_from_dict_or_env(
values,
"hunyuan_app_id",
"HUNYUAN_APP_ID",
)
values["hunyuan_secret_id"] = get_from_dict_or_env(
values,
"hunyuan_secret_id",
"HUNYUAN_SECRET_ID",
)
values["hunyuan_secret_key"] = convert_to_secret_str(
get_from_dict_or_env(
values,
"hunyuan_secret_key",
"HUNYUAN_SECRET_KEY",
)
)
return values
@property
def _default_params(self) -> Dict[str, Any]:
"""Get the default parameters for calling Hunyuan API."""
normal_params = {
"app_id": self.hunyuan_app_id,
"secret_id": self.hunyuan_secret_id, | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/hunyuan.html |
bc9525303fdf-5 | "secret_id": self.hunyuan_secret_id,
"temperature": self.temperature,
"top_p": self.top_p,
}
if self.query_id is not None:
normal_params["query_id"] = self.query_id
return {**normal_params, **self.model_kwargs}
def _generate(
self,
messages: List[BaseMessage],
stop: Optional[List[str]] = None,
run_manager: Optional[CallbackManagerForLLMRun] = None,
**kwargs: Any,
) -> ChatResult:
if self.streaming:
stream_iter = self._stream(
messages=messages, stop=stop, run_manager=run_manager, **kwargs
)
return _generate_from_stream(stream_iter)
res = self._chat(messages, **kwargs)
response = res.json()
if "error" in response:
raise ValueError(f"Error from Hunyuan api response: {response}")
return _create_chat_result(response)
def _stream(
self,
messages: List[BaseMessage],
stop: Optional[List[str]] = None,
run_manager: Optional[CallbackManagerForLLMRun] = None,
**kwargs: Any,
) -> Iterator[ChatGenerationChunk]:
res = self._chat(messages, **kwargs)
default_chunk_class = AIMessageChunk
for chunk in res.iter_lines():
response = json.loads(chunk)
if "error" in response:
raise ValueError(f"Error from Hunyuan api response: {response}")
for choice in response["choices"]:
chunk = _convert_delta_to_message_chunk(
choice["delta"], default_chunk_class
) | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/hunyuan.html |
bc9525303fdf-6 | choice["delta"], default_chunk_class
)
default_chunk_class = chunk.__class__
yield ChatGenerationChunk(message=chunk)
if run_manager:
run_manager.on_llm_new_token(chunk.content)
def _chat(self, messages: List[BaseMessage], **kwargs: Any) -> requests.Response:
if self.hunyuan_secret_key is None:
raise ValueError("Hunyuan secret key is not set.")
parameters = {**self._default_params, **kwargs}
headers = parameters.pop("headers", {})
timestamp = parameters.pop("timestamp", int(time.time()))
expired = parameters.pop("expired", timestamp + 24 * 60 * 60)
payload = {
"timestamp": timestamp,
"expired": expired,
"messages": [_convert_message_to_dict(m) for m in messages],
**parameters,
}
if self.streaming:
payload["stream"] = 1
url = self.hunyuan_api_base + DEFAULT_PATH
res = requests.post(
url=url,
timeout=self.request_timeout,
headers={
"Content-Type": "application/json",
"Authorization": _signature(
secret_key=self.hunyuan_secret_key, url=url, payload=payload
),
**headers,
},
json=payload,
stream=self.streaming,
)
return res
@property
def _llm_type(self) -> str:
return "hunyuan-chat" | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/hunyuan.html |
725d088e8c13-0 | Source code for langchain.chat_models.ollama
import json
from typing import Any, Iterator, List, Optional
from langchain.callbacks.manager import (
CallbackManagerForLLMRun,
)
from langchain.chat_models.base import BaseChatModel
from langchain.llms.ollama import _OllamaCommon
from langchain.schema import ChatResult
from langchain.schema.messages import (
AIMessage,
AIMessageChunk,
BaseMessage,
ChatMessage,
HumanMessage,
SystemMessage,
)
from langchain.schema.output import ChatGeneration, ChatGenerationChunk
def _stream_response_to_chat_generation_chunk(
stream_response: str,
) -> ChatGenerationChunk:
"""Convert a stream response to a generation chunk."""
parsed_response = json.loads(stream_response)
generation_info = parsed_response if parsed_response.get("done") is True else None
return ChatGenerationChunk(
message=AIMessageChunk(content=parsed_response.get("response", "")),
generation_info=generation_info,
)
[docs]class ChatOllama(BaseChatModel, _OllamaCommon):
"""Ollama locally runs large language models.
To use, follow the instructions at https://ollama.ai/.
Example:
.. code-block:: python
from langchain.chat_models import ChatOllama
ollama = ChatOllama(model="llama2")
"""
@property
def _llm_type(self) -> str:
"""Return type of chat model."""
return "ollama-chat"
[docs] @classmethod
def is_lc_serializable(cls) -> bool:
"""Return whether this model can be serialized by Langchain."""
return True | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/ollama.html |
725d088e8c13-1 | """Return whether this model can be serialized by Langchain."""
return True
def _format_message_as_text(self, message: BaseMessage) -> str:
if isinstance(message, ChatMessage):
message_text = f"\n\n{message.role.capitalize()}: {message.content}"
elif isinstance(message, HumanMessage):
message_text = f"[INST] {message.content} [/INST]"
elif isinstance(message, AIMessage):
message_text = f"{message.content}"
elif isinstance(message, SystemMessage):
message_text = f"<<SYS>> {message.content} <</SYS>>"
else:
raise ValueError(f"Got unknown type {message}")
return message_text
def _format_messages_as_text(self, messages: List[BaseMessage]) -> str:
return "\n".join(
[self._format_message_as_text(message) for message in messages]
)
def _generate(
self,
messages: List[BaseMessage],
stop: Optional[List[str]] = None,
run_manager: Optional[CallbackManagerForLLMRun] = None,
**kwargs: Any,
) -> ChatResult:
"""Call out to Ollama's generate endpoint.
Args:
messages: The list of base messages to pass into the model.
stop: Optional list of stop words to use when generating.
Returns:
Chat generations from the model
Example:
.. code-block:: python
response = ollama([
HumanMessage(content="Tell me about the history of AI")
])
"""
prompt = self._format_messages_as_text(messages)
final_chunk = super()._stream_with_aggregation( | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/ollama.html |
725d088e8c13-2 | final_chunk = super()._stream_with_aggregation(
prompt, stop=stop, run_manager=run_manager, verbose=self.verbose, **kwargs
)
chat_generation = ChatGeneration(
message=AIMessage(content=final_chunk.text),
generation_info=final_chunk.generation_info,
)
return ChatResult(generations=[chat_generation])
def _stream(
self,
messages: List[BaseMessage],
stop: Optional[List[str]] = None,
run_manager: Optional[CallbackManagerForLLMRun] = None,
**kwargs: Any,
) -> Iterator[ChatGenerationChunk]:
prompt = self._format_messages_as_text(messages)
for stream_resp in self._create_stream(prompt, stop, **kwargs):
if stream_resp:
chunk = _stream_response_to_chat_generation_chunk(stream_resp)
yield chunk
if run_manager:
run_manager.on_llm_new_token(
chunk.text,
verbose=self.verbose,
) | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/ollama.html |
68a8ae8de3c5-0 | Source code for langchain.chat_models.openai
"""OpenAI chat wrapper."""
from __future__ import annotations
import logging
import os
import sys
from typing import (
TYPE_CHECKING,
Any,
AsyncIterator,
Callable,
Dict,
Iterator,
List,
Mapping,
Optional,
Sequence,
Tuple,
Type,
Union,
)
from langchain.adapters.openai import convert_dict_to_message, convert_message_to_dict
from langchain.callbacks.manager import (
AsyncCallbackManagerForLLMRun,
CallbackManagerForLLMRun,
)
from langchain.chat_models.base import (
BaseChatModel,
_agenerate_from_stream,
_generate_from_stream,
)
from langchain.llms.base import create_base_retry_decorator
from langchain.pydantic_v1 import BaseModel, Field, root_validator
from langchain.schema import ChatGeneration, ChatResult
from langchain.schema.language_model import LanguageModelInput
from langchain.schema.messages import (
AIMessageChunk,
BaseMessage,
BaseMessageChunk,
ChatMessageChunk,
FunctionMessageChunk,
HumanMessageChunk,
SystemMessageChunk,
ToolMessageChunk,
)
from langchain.schema.output import ChatGenerationChunk
from langchain.schema.runnable import Runnable
from langchain.utils import (
get_from_dict_or_env,
get_pydantic_field_names,
)
from langchain.utils.openai import is_openai_v1
if TYPE_CHECKING:
import tiktoken
logger = logging.getLogger(__name__)
def _import_tiktoken() -> Any:
try:
import tiktoken
except ImportError:
raise ValueError(
"Could not import tiktoken python package. " | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/openai.html |
68a8ae8de3c5-1 | raise ValueError(
"Could not import tiktoken python package. "
"This is needed in order to calculate get_token_ids. "
"Please install it with `pip install tiktoken`."
)
return tiktoken
def _create_retry_decorator(
llm: ChatOpenAI,
run_manager: Optional[
Union[AsyncCallbackManagerForLLMRun, CallbackManagerForLLMRun]
] = None,
) -> Callable[[Any], Any]:
import openai
errors = [
openai.error.Timeout,
openai.error.APIError,
openai.error.APIConnectionError,
openai.error.RateLimitError,
openai.error.ServiceUnavailableError,
]
return create_base_retry_decorator(
error_types=errors, max_retries=llm.max_retries, run_manager=run_manager
)
[docs]async def acompletion_with_retry(
llm: ChatOpenAI,
run_manager: Optional[AsyncCallbackManagerForLLMRun] = None,
**kwargs: Any,
) -> Any:
"""Use tenacity to retry the async completion call."""
if is_openai_v1():
return await llm.async_client.create(**kwargs)
retry_decorator = _create_retry_decorator(llm, run_manager=run_manager)
@retry_decorator
async def _completion_with_retry(**kwargs: Any) -> Any:
# Use OpenAI's async api https://github.com/openai/openai-python#async-api
return await llm.client.acreate(**kwargs)
return await _completion_with_retry(**kwargs)
def _convert_delta_to_message_chunk(
_dict: Mapping[str, Any], default_class: Type[BaseMessageChunk] | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/openai.html |
68a8ae8de3c5-2 | _dict: Mapping[str, Any], default_class: Type[BaseMessageChunk]
) -> BaseMessageChunk:
role = _dict.get("role")
content = _dict.get("content") or ""
additional_kwargs: Dict = {}
if _dict.get("function_call"):
function_call = dict(_dict["function_call"])
if "name" in function_call and function_call["name"] is None:
function_call["name"] = ""
additional_kwargs["function_call"] = function_call
if _dict.get("tool_calls"):
additional_kwargs["tool_calls"] = _dict["tool_calls"]
if role == "user" or default_class == HumanMessageChunk:
return HumanMessageChunk(content=content)
elif role == "assistant" or default_class == AIMessageChunk:
return AIMessageChunk(content=content, additional_kwargs=additional_kwargs)
elif role == "system" or default_class == SystemMessageChunk:
return SystemMessageChunk(content=content)
elif role == "function" or default_class == FunctionMessageChunk:
return FunctionMessageChunk(content=content, name=_dict["name"])
elif role == "tool" or default_class == ToolMessageChunk:
return ToolMessageChunk(content=content, tool_call_id=_dict["tool_call_id"])
elif role or default_class == ChatMessageChunk:
return ChatMessageChunk(content=content, role=role)
else:
return default_class(content=content)
[docs]class ChatOpenAI(BaseChatModel):
"""`OpenAI` Chat large language models API.
To use, you should have the ``openai`` python package installed, and the
environment variable ``OPENAI_API_KEY`` set with your API key. | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/openai.html |
68a8ae8de3c5-3 | environment variable ``OPENAI_API_KEY`` set with your API key.
Any parameters that are valid to be passed to the openai.create call can be passed
in, even if not explicitly saved on this class.
Example:
.. code-block:: python
from langchain.chat_models import ChatOpenAI
openai = ChatOpenAI(model_name="gpt-3.5-turbo")
"""
@property
def lc_secrets(self) -> Dict[str, str]:
return {"openai_api_key": "OPENAI_API_KEY"}
@property
def lc_attributes(self) -> Dict[str, Any]:
attributes: Dict[str, Any] = {}
if self.openai_organization:
attributes["openai_organization"] = self.openai_organization
if self.openai_api_base:
attributes["openai_api_base"] = self.openai_api_base
if self.openai_proxy:
attributes["openai_proxy"] = self.openai_proxy
return attributes
[docs] @classmethod
def is_lc_serializable(cls) -> bool:
"""Return whether this model can be serialized by Langchain."""
return True
client: Any = Field(default=None, exclude=True) #: :meta private:
async_client: Any = Field(default=None, exclude=True) #: :meta private:
model_name: str = Field(default="gpt-3.5-turbo", alias="model")
"""Model name to use."""
temperature: float = 0.7
"""What sampling temperature to use."""
model_kwargs: Dict[str, Any] = Field(default_factory=dict)
"""Holds any model parameters valid for `create` call not explicitly specified."""
# When updating this to use a SecretStr | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/openai.html |
68a8ae8de3c5-4 | # When updating this to use a SecretStr
# Check for classes that derive from this class (as some of them
# may assume openai_api_key is a str)
openai_api_key: Optional[str] = Field(default=None, alias="api_key")
"""Automatically inferred from env var `OPENAI_API_KEY` if not provided."""
openai_api_base: Optional[str] = Field(default=None, alias="base_url")
"""Base URL path for API requests, leave blank if not using a proxy or service
emulator."""
openai_organization: Optional[str] = Field(default=None, alias="organization")
"""Automatically inferred from env var `OPENAI_ORG_ID` if not provided."""
# to support explicit proxy for OpenAI
openai_proxy: Optional[str] = None
request_timeout: Union[float, Tuple[float, float], Any, None] = Field(
default=None, alias="timeout"
)
"""Timeout for requests to OpenAI completion API. Can be float, httpx.Timeout or
None."""
max_retries: int = 2
"""Maximum number of retries to make when generating."""
streaming: bool = False
"""Whether to stream the results or not."""
n: int = 1
"""Number of chat completions to generate for each prompt."""
max_tokens: Optional[int] = None
"""Maximum number of tokens to generate."""
tiktoken_model_name: Optional[str] = None
"""The model name to pass to tiktoken when using this class.
Tiktoken is used to count the number of tokens in documents to constrain
them to be under a certain limit. By default, when set to None, this will | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/openai.html |
68a8ae8de3c5-5 | be the same as the embedding model name. However, there are some cases
where you may want to use this Embedding class with a model name not
supported by tiktoken. This can include when using Azure embeddings or
when using one of the many model providers that expose an OpenAI-like
API but with different models. In those cases, in order to avoid erroring
when tiktoken is called, you can specify a model name to use here."""
default_headers: Union[Mapping[str, str], None] = None
default_query: Union[Mapping[str, object], None] = None
# Configure a custom httpx client. See the
# [httpx documentation](https://www.python-httpx.org/api/#client) for more details.
http_client: Union[Any, None] = None
"""Optional httpx.Client."""
class Config:
"""Configuration for this pydantic object."""
allow_population_by_field_name = True
@root_validator(pre=True)
def build_extra(cls, values: Dict[str, Any]) -> Dict[str, Any]:
"""Build extra kwargs from additional params that were passed in."""
all_required_field_names = get_pydantic_field_names(cls)
extra = values.get("model_kwargs", {})
for field_name in list(values):
if field_name in extra:
raise ValueError(f"Found {field_name} supplied twice.")
if field_name not in all_required_field_names:
logger.warning(
f"""WARNING! {field_name} is not default parameter.
{field_name} was transferred to model_kwargs.
Please confirm that {field_name} is what you intended."""
)
extra[field_name] = values.pop(field_name) | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/openai.html |
68a8ae8de3c5-6 | )
extra[field_name] = values.pop(field_name)
invalid_model_kwargs = all_required_field_names.intersection(extra.keys())
if invalid_model_kwargs:
raise ValueError(
f"Parameters {invalid_model_kwargs} should be specified explicitly. "
f"Instead they were passed in as part of `model_kwargs` parameter."
)
values["model_kwargs"] = extra
return values
@root_validator()
def validate_environment(cls, values: Dict) -> Dict:
"""Validate that api key and python package exists in environment."""
if values["n"] < 1:
raise ValueError("n must be at least 1.")
if values["n"] > 1 and values["streaming"]:
raise ValueError("n must be 1 when streaming.")
values["openai_api_key"] = get_from_dict_or_env(
values, "openai_api_key", "OPENAI_API_KEY"
)
# Check OPENAI_ORGANIZATION for backwards compatibility.
values["openai_organization"] = (
values["openai_organization"]
or os.getenv("OPENAI_ORG_ID")
or os.getenv("OPENAI_ORGANIZATION")
)
values["openai_api_base"] = values["openai_api_base"] or os.getenv(
"OPENAI_API_BASE"
)
values["openai_proxy"] = get_from_dict_or_env(
values,
"openai_proxy",
"OPENAI_PROXY",
default="",
)
try:
import openai
except ImportError:
raise ImportError(
"Could not import openai python package. "
"Please install it with `pip install openai`."
)
if is_openai_v1(): | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/openai.html |
68a8ae8de3c5-7 | )
if is_openai_v1():
client_params = {
"api_key": values["openai_api_key"],
"organization": values["openai_organization"],
"base_url": values["openai_api_base"],
"timeout": values["request_timeout"],
"max_retries": values["max_retries"],
"default_headers": values["default_headers"],
"default_query": values["default_query"],
"http_client": values["http_client"],
}
if not values.get("client"):
values["client"] = openai.OpenAI(**client_params).chat.completions
if not values.get("async_client"):
values["async_client"] = openai.AsyncOpenAI(
**client_params
).chat.completions
elif not values.get("client"):
values["client"] = openai.ChatCompletion
else:
pass
return values
@property
def _default_params(self) -> Dict[str, Any]:
"""Get the default parameters for calling OpenAI API."""
params = {
"model": self.model_name,
"stream": self.streaming,
"n": self.n,
"temperature": self.temperature,
**self.model_kwargs,
}
if self.max_tokens is not None:
params["max_tokens"] = self.max_tokens
if self.request_timeout is not None and not is_openai_v1():
params["request_timeout"] = self.request_timeout
return params
[docs] def completion_with_retry(
self, run_manager: Optional[CallbackManagerForLLMRun] = None, **kwargs: Any
) -> Any:
"""Use tenacity to retry the completion call.""" | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/openai.html |
68a8ae8de3c5-8 | ) -> Any:
"""Use tenacity to retry the completion call."""
if is_openai_v1():
return self.client.create(**kwargs)
retry_decorator = _create_retry_decorator(self, run_manager=run_manager)
@retry_decorator
def _completion_with_retry(**kwargs: Any) -> Any:
return self.client.create(**kwargs)
return _completion_with_retry(**kwargs)
def _combine_llm_outputs(self, llm_outputs: List[Optional[dict]]) -> dict:
overall_token_usage: dict = {}
system_fingerprint = None
for output in llm_outputs:
if output is None:
# Happens in streaming
continue
token_usage = output["token_usage"]
for k, v in token_usage.items():
if k in overall_token_usage:
overall_token_usage[k] += v
else:
overall_token_usage[k] = v
if system_fingerprint is None:
system_fingerprint = output.get("system_fingerprint")
combined = {"token_usage": overall_token_usage, "model_name": self.model_name}
if system_fingerprint:
combined["system_fingerprint"] = system_fingerprint
return combined
def _stream(
self,
messages: List[BaseMessage],
stop: Optional[List[str]] = None,
run_manager: Optional[CallbackManagerForLLMRun] = None,
**kwargs: Any,
) -> Iterator[ChatGenerationChunk]:
message_dicts, params = self._create_message_dicts(messages, stop)
params = {**params, **kwargs, "stream": True}
default_chunk_class = AIMessageChunk
for chunk in self.completion_with_retry( | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/openai.html |
68a8ae8de3c5-9 | default_chunk_class = AIMessageChunk
for chunk in self.completion_with_retry(
messages=message_dicts, run_manager=run_manager, **params
):
if not isinstance(chunk, dict):
chunk = chunk.dict()
if len(chunk["choices"]) == 0:
continue
choice = chunk["choices"][0]
chunk = _convert_delta_to_message_chunk(
choice["delta"], default_chunk_class
)
finish_reason = choice.get("finish_reason")
generation_info = (
dict(finish_reason=finish_reason) if finish_reason is not None else None
)
default_chunk_class = chunk.__class__
chunk = ChatGenerationChunk(message=chunk, generation_info=generation_info)
yield chunk
if run_manager:
run_manager.on_llm_new_token(chunk.text, chunk=chunk)
def _generate(
self,
messages: List[BaseMessage],
stop: Optional[List[str]] = None,
run_manager: Optional[CallbackManagerForLLMRun] = None,
stream: Optional[bool] = None,
**kwargs: Any,
) -> ChatResult:
should_stream = stream if stream is not None else self.streaming
if should_stream:
stream_iter = self._stream(
messages, stop=stop, run_manager=run_manager, **kwargs
)
return _generate_from_stream(stream_iter)
message_dicts, params = self._create_message_dicts(messages, stop)
params = {**params, **kwargs}
response = self.completion_with_retry(
messages=message_dicts, run_manager=run_manager, **params
)
return self._create_chat_result(response)
def _create_message_dicts( | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/openai.html |
68a8ae8de3c5-10 | return self._create_chat_result(response)
def _create_message_dicts(
self, messages: List[BaseMessage], stop: Optional[List[str]]
) -> Tuple[List[Dict[str, Any]], Dict[str, Any]]:
params = self._client_params
if stop is not None:
if "stop" in params:
raise ValueError("`stop` found in both the input and default params.")
params["stop"] = stop
message_dicts = [convert_message_to_dict(m) for m in messages]
return message_dicts, params
def _create_chat_result(self, response: Union[dict, BaseModel]) -> ChatResult:
generations = []
if not isinstance(response, dict):
response = response.dict()
for res in response["choices"]:
message = convert_dict_to_message(res["message"])
gen = ChatGeneration(
message=message,
generation_info=dict(finish_reason=res.get("finish_reason")),
)
generations.append(gen)
token_usage = response.get("usage", {})
llm_output = {
"token_usage": token_usage,
"model_name": self.model_name,
"system_fingerprint": response.get("system_fingerprint", ""),
}
return ChatResult(generations=generations, llm_output=llm_output)
async def _astream(
self,
messages: List[BaseMessage],
stop: Optional[List[str]] = None,
run_manager: Optional[AsyncCallbackManagerForLLMRun] = None,
**kwargs: Any,
) -> AsyncIterator[ChatGenerationChunk]:
message_dicts, params = self._create_message_dicts(messages, stop)
params = {**params, **kwargs, "stream": True} | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/openai.html |
68a8ae8de3c5-11 | params = {**params, **kwargs, "stream": True}
default_chunk_class = AIMessageChunk
async for chunk in await acompletion_with_retry(
self, messages=message_dicts, run_manager=run_manager, **params
):
if not isinstance(chunk, dict):
chunk = chunk.dict()
if len(chunk["choices"]) == 0:
continue
choice = chunk["choices"][0]
chunk = _convert_delta_to_message_chunk(
choice["delta"], default_chunk_class
)
finish_reason = choice.get("finish_reason")
generation_info = (
dict(finish_reason=finish_reason) if finish_reason is not None else None
)
default_chunk_class = chunk.__class__
chunk = ChatGenerationChunk(message=chunk, generation_info=generation_info)
yield chunk
if run_manager:
await run_manager.on_llm_new_token(token=chunk.text, chunk=chunk)
async def _agenerate(
self,
messages: List[BaseMessage],
stop: Optional[List[str]] = None,
run_manager: Optional[AsyncCallbackManagerForLLMRun] = None,
stream: Optional[bool] = None,
**kwargs: Any,
) -> ChatResult:
should_stream = stream if stream is not None else self.streaming
if should_stream:
stream_iter = self._astream(
messages, stop=stop, run_manager=run_manager, **kwargs
)
return await _agenerate_from_stream(stream_iter)
message_dicts, params = self._create_message_dicts(messages, stop)
params = {**params, **kwargs}
response = await acompletion_with_retry( | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/openai.html |
68a8ae8de3c5-12 | response = await acompletion_with_retry(
self, messages=message_dicts, run_manager=run_manager, **params
)
return self._create_chat_result(response)
@property
def _identifying_params(self) -> Dict[str, Any]:
"""Get the identifying parameters."""
return {**{"model_name": self.model_name}, **self._default_params}
@property
def _client_params(self) -> Dict[str, Any]:
"""Get the parameters used for the openai client."""
openai_creds: Dict[str, Any] = {
"model": self.model_name,
}
if not is_openai_v1():
openai_creds.update(
{
"api_key": self.openai_api_key,
"api_base": self.openai_api_base,
"organization": self.openai_organization,
}
)
if self.openai_proxy:
import openai
openai.proxy = {"http": self.openai_proxy, "https": self.openai_proxy} # type: ignore[assignment] # noqa: E501
return {**self._default_params, **openai_creds}
def _get_invocation_params(
self, stop: Optional[List[str]] = None, **kwargs: Any
) -> Dict[str, Any]:
"""Get the parameters used to invoke the model."""
return {
"model": self.model_name,
**super()._get_invocation_params(stop=stop),
**self._default_params,
**kwargs,
}
@property
def _llm_type(self) -> str:
"""Return type of chat model."""
return "openai-chat" | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/openai.html |
68a8ae8de3c5-13 | """Return type of chat model."""
return "openai-chat"
def _get_encoding_model(self) -> Tuple[str, tiktoken.Encoding]:
tiktoken_ = _import_tiktoken()
if self.tiktoken_model_name is not None:
model = self.tiktoken_model_name
else:
model = self.model_name
if model == "gpt-3.5-turbo":
# gpt-3.5-turbo may change over time.
# Returning num tokens assuming gpt-3.5-turbo-0301.
model = "gpt-3.5-turbo-0301"
elif model == "gpt-4":
# gpt-4 may change over time.
# Returning num tokens assuming gpt-4-0314.
model = "gpt-4-0314"
# Returns the number of tokens used by a list of messages.
try:
encoding = tiktoken_.encoding_for_model(model)
except KeyError:
logger.warning("Warning: model not found. Using cl100k_base encoding.")
model = "cl100k_base"
encoding = tiktoken_.get_encoding(model)
return model, encoding
[docs] def get_token_ids(self, text: str) -> List[int]:
"""Get the tokens present in the text with tiktoken package."""
# tiktoken NOT supported for Python 3.7 or below
if sys.version_info[1] <= 7:
return super().get_token_ids(text)
_, encoding_model = self._get_encoding_model()
return encoding_model.encode(text)
[docs] def get_num_tokens_from_messages(self, messages: List[BaseMessage]) -> int: | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/openai.html |
68a8ae8de3c5-14 | """Calculate num tokens for gpt-3.5-turbo and gpt-4 with tiktoken package.
Official documentation: https://github.com/openai/openai-cookbook/blob/
main/examples/How_to_format_inputs_to_ChatGPT_models.ipynb"""
if sys.version_info[1] <= 7:
return super().get_num_tokens_from_messages(messages)
model, encoding = self._get_encoding_model()
if model.startswith("gpt-3.5-turbo-0301"):
# every message follows <im_start>{role/name}\n{content}<im_end>\n
tokens_per_message = 4
# if there's a name, the role is omitted
tokens_per_name = -1
elif model.startswith("gpt-3.5-turbo") or model.startswith("gpt-4"):
tokens_per_message = 3
tokens_per_name = 1
else:
raise NotImplementedError(
f"get_num_tokens_from_messages() is not presently implemented "
f"for model {model}."
"See https://github.com/openai/openai-python/blob/main/chatml.md for "
"information on how messages are converted to tokens."
)
num_tokens = 0
messages_dict = [convert_message_to_dict(m) for m in messages]
for message in messages_dict:
num_tokens += tokens_per_message
for key, value in message.items():
# Cast str(value) in case the message value is not a string
# This occurs with function messages
num_tokens += len(encoding.encode(str(value)))
if key == "name":
num_tokens += tokens_per_name
# every reply is primed with <im_start>assistant | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/openai.html |
68a8ae8de3c5-15 | # every reply is primed with <im_start>assistant
num_tokens += 3
return num_tokens
[docs] def bind_functions(
self,
functions: Sequence[Union[Dict[str, Any], Type[BaseModel], Callable]],
function_call: Optional[str] = None,
**kwargs: Any,
) -> Runnable[LanguageModelInput, BaseMessage]:
"""Bind functions (and other objects) to this chat model.
Args:
functions: A list of function definitions to bind to this chat model.
Can be a dictionary, pydantic model, or callable. Pydantic
models and callables will be automatically converted to
their schema dictionary representation.
function_call: Which function to require the model to call.
Must be the name of the single provided function or
"auto" to automatically determine which function to call
(if any).
kwargs: Any additional parameters to pass to the
:class:`~langchain.runnable.Runnable` constructor.
"""
from langchain.chains.openai_functions.base import convert_to_openai_function
formatted_functions = [convert_to_openai_function(fn) for fn in functions]
if function_call is not None:
if len(formatted_functions) != 1:
raise ValueError(
"When specifying `function_call`, you must provide exactly one "
"function."
)
if formatted_functions[0]["name"] != function_call:
raise ValueError(
f"Function call {function_call} was specified, but the only "
f"provided function was {formatted_functions[0]['name']}."
)
function_call_ = {"name": function_call} | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/openai.html |
68a8ae8de3c5-16 | )
function_call_ = {"name": function_call}
kwargs = {**kwargs, "function_call": function_call_}
return super().bind(
functions=formatted_functions,
**kwargs,
) | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_models/openai.html |
064a9b403032-0 | Source code for langchain.chat_loaders.gmail
import base64
import re
from typing import Any, Iterator
from langchain.chat_loaders.base import BaseChatLoader
from langchain.schema.chat import ChatSession
from langchain.schema.messages import HumanMessage
def _extract_email_content(msg: Any) -> HumanMessage:
from_email = None
for values in msg["payload"]["headers"]:
name = values["name"]
if name == "From":
from_email = values["value"]
if from_email is None:
raise ValueError
for part in msg["payload"]["parts"]:
if part["mimeType"] == "text/plain":
data = part["body"]["data"]
data = base64.urlsafe_b64decode(data).decode("utf-8")
# Regular expression to split the email body at the first
# occurrence of a line that starts with "On ... wrote:"
pattern = re.compile(r"\r\nOn .+(\r\n)*wrote:\r\n")
# Split the email body and extract the first part
newest_response = re.split(pattern, data)[0]
message = HumanMessage(
content=newest_response, additional_kwargs={"sender": from_email}
)
return message
raise ValueError
def _get_message_data(service: Any, message: Any) -> ChatSession:
msg = service.users().messages().get(userId="me", id=message["id"]).execute()
message_content = _extract_email_content(msg)
in_reply_to = None
email_data = msg["payload"]["headers"]
for values in email_data:
name = values["name"]
if name == "In-Reply-To":
in_reply_to = values["value"]
if in_reply_to is None:
raise ValueError | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_loaders/gmail.html |
064a9b403032-1 | if in_reply_to is None:
raise ValueError
thread_id = msg["threadId"]
thread = service.users().threads().get(userId="me", id=thread_id).execute()
messages = thread["messages"]
response_email = None
for message in messages:
email_data = message["payload"]["headers"]
for values in email_data:
if values["name"] == "Message-ID":
message_id = values["value"]
if message_id == in_reply_to:
response_email = message
if response_email is None:
raise ValueError
starter_content = _extract_email_content(response_email)
return ChatSession(messages=[starter_content, message_content])
[docs]class GMailLoader(BaseChatLoader):
"""Load data from `GMail`.
There are many ways you could want to load data from GMail.
This loader is currently fairly opinionated in how to do so.
The way it does it is it first looks for all messages that you have sent.
It then looks for messages where you are responding to a previous email.
It then fetches that previous email, and creates a training example
of that email, followed by your email.
Note that there are clear limitations here. For example,
all examples created are only looking at the previous email for context.
To use:
- Set up a Google Developer Account:
Go to the Google Developer Console, create a project,
and enable the Gmail API for that project.
This will give you a credentials.json file that you'll need later.
"""
[docs] def __init__(self, creds: Any, n: int = 100, raise_error: bool = False) -> None:
super().__init__() | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_loaders/gmail.html |
064a9b403032-2 | super().__init__()
self.creds = creds
self.n = n
self.raise_error = raise_error
[docs] def lazy_load(self) -> Iterator[ChatSession]:
from googleapiclient.discovery import build
service = build("gmail", "v1", credentials=self.creds)
results = (
service.users()
.messages()
.list(userId="me", labelIds=["SENT"], maxResults=self.n)
.execute()
)
messages = results.get("messages", [])
for message in messages:
try:
yield _get_message_data(service, message)
except Exception as e:
# TODO: handle errors better
if self.raise_error:
raise e
else:
pass | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_loaders/gmail.html |
7c54ae1edfd2-0 | Source code for langchain.chat_loaders.base
from abc import ABC, abstractmethod
from typing import Iterator, List
from langchain.schema.chat import ChatSession
[docs]class BaseChatLoader(ABC):
"""Base class for chat loaders."""
[docs] @abstractmethod
def lazy_load(self) -> Iterator[ChatSession]:
"""Lazy load the chat sessions."""
[docs] def load(self) -> List[ChatSession]:
"""Eagerly load the chat sessions into memory."""
return list(self.lazy_load()) | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_loaders/base.html |
c4382d75a139-0 | Source code for langchain.chat_loaders.imessage
from __future__ import annotations
from pathlib import Path
from typing import TYPE_CHECKING, Iterator, List, Optional, Union
from langchain.chat_loaders.base import BaseChatLoader
from langchain.schema import HumanMessage
from langchain.schema.chat import ChatSession
if TYPE_CHECKING:
import sqlite3
[docs]class IMessageChatLoader(BaseChatLoader):
"""Load chat sessions from the `iMessage` chat.db SQLite file.
It only works on macOS when you have iMessage enabled and have the chat.db file.
The chat.db file is likely located at ~/Library/Messages/chat.db. However, your
terminal may not have permission to access this file. To resolve this, you can
copy the file to a different location, change the permissions of the file, or
grant full disk access for your terminal emulator
in System Settings > Security and Privacy > Full Disk Access.
"""
[docs] def __init__(self, path: Optional[Union[str, Path]] = None):
"""
Initialize the IMessageChatLoader.
Args:
path (str or Path, optional): Path to the chat.db SQLite file.
Defaults to None, in which case the default path
~/Library/Messages/chat.db will be used.
"""
if path is None:
path = Path.home() / "Library" / "Messages" / "chat.db"
self.db_path = path if isinstance(path, Path) else Path(path)
if not self.db_path.exists():
raise FileNotFoundError(f"File {self.db_path} not found")
try:
import sqlite3 # noqa: F401
except ImportError as e:
raise ImportError( | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_loaders/imessage.html |
c4382d75a139-1 | except ImportError as e:
raise ImportError(
"The sqlite3 module is required to load iMessage chats.\n"
"Please install it with `pip install pysqlite3`"
) from e
def _load_single_chat_session(
self, cursor: "sqlite3.Cursor", chat_id: int
) -> ChatSession:
"""
Load a single chat session from the iMessage chat.db.
Args:
cursor: SQLite cursor object.
chat_id (int): ID of the chat session to load.
Returns:
ChatSession: Loaded chat session.
"""
results: List[HumanMessage] = []
query = """
SELECT message.date, handle.id, message.text
FROM message
JOIN chat_message_join ON message.ROWID = chat_message_join.message_id
JOIN handle ON message.handle_id = handle.ROWID
WHERE chat_message_join.chat_id = ?
ORDER BY message.date ASC;
"""
cursor.execute(query, (chat_id,))
messages = cursor.fetchall()
for date, sender, text in messages:
if text: # Skip empty messages
results.append(
HumanMessage(
role=sender,
content=text,
additional_kwargs={
"message_time": date,
"sender": sender,
},
)
)
return ChatSession(messages=results)
[docs] def lazy_load(self) -> Iterator[ChatSession]:
"""
Lazy load the chat sessions from the iMessage chat.db
and yield them in the required format.
Yields:
ChatSession: Loaded chat session.
"""
import sqlite3
try:
conn = sqlite3.connect(self.db_path) | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_loaders/imessage.html |
c4382d75a139-2 | import sqlite3
try:
conn = sqlite3.connect(self.db_path)
except sqlite3.OperationalError as e:
raise ValueError(
f"Could not open iMessage DB file {self.db_path}.\n"
"Make sure your terminal emulator has disk access to this file.\n"
" You can either copy the DB file to an accessible location"
" or grant full disk access for your terminal emulator."
" You can grant full disk access for your terminal emulator"
" in System Settings > Security and Privacy > Full Disk Access."
) from e
cursor = conn.cursor()
# Fetch the list of chat IDs sorted by time (most recent first)
query = """SELECT chat_id
FROM message
JOIN chat_message_join ON message.ROWID = chat_message_join.message_id
GROUP BY chat_id
ORDER BY MAX(date) DESC;"""
cursor.execute(query)
chat_ids = [row[0] for row in cursor.fetchall()]
for chat_id in chat_ids:
yield self._load_single_chat_session(cursor, chat_id)
conn.close() | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_loaders/imessage.html |
ce783fcc1491-0 | Source code for langchain.chat_loaders.utils
"""Utilities for chat loaders."""
from copy import deepcopy
from typing import Iterable, Iterator, List
from langchain.schema.chat import ChatSession
from langchain.schema.messages import AIMessage, BaseMessage
[docs]def merge_chat_runs_in_session(
chat_session: ChatSession, delimiter: str = "\n\n"
) -> ChatSession:
"""Merge chat runs together in a chat session.
A chat run is a sequence of messages from the same sender.
Args:
chat_session: A chat session.
Returns:
A chat session with merged chat runs.
"""
messages: List[BaseMessage] = []
for message in chat_session["messages"]:
if not isinstance(message.content, str):
raise ValueError(
"Chat Loaders only support messages with content type string, "
f"got {message.content}"
)
if not messages:
messages.append(deepcopy(message))
elif (
isinstance(message, type(messages[-1]))
and messages[-1].additional_kwargs.get("sender") is not None
and messages[-1].additional_kwargs["sender"]
== message.additional_kwargs.get("sender")
):
if not isinstance(messages[-1].content, str):
raise ValueError(
"Chat Loaders only support messages with content type string, "
f"got {messages[-1].content}"
)
messages[-1].content = (
messages[-1].content + delimiter + message.content
).strip()
messages[-1].additional_kwargs.get("events", []).extend(
message.additional_kwargs.get("events") or []
)
else:
messages.append(deepcopy(message))
return ChatSession(messages=messages) | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_loaders/utils.html |
ce783fcc1491-1 | messages.append(deepcopy(message))
return ChatSession(messages=messages)
[docs]def merge_chat_runs(chat_sessions: Iterable[ChatSession]) -> Iterator[ChatSession]:
"""Merge chat runs together.
A chat run is a sequence of messages from the same sender.
Args:
chat_sessions: A list of chat sessions.
Returns:
A list of chat sessions with merged chat runs.
"""
for chat_session in chat_sessions:
yield merge_chat_runs_in_session(chat_session)
[docs]def map_ai_messages_in_session(chat_sessions: ChatSession, sender: str) -> ChatSession:
"""Convert messages from the specified 'sender' to AI messages.
This is useful for fine-tuning the AI to adapt to your voice.
"""
messages = []
num_converted = 0
for message in chat_sessions["messages"]:
if message.additional_kwargs.get("sender") == sender:
message = AIMessage(
content=message.content,
additional_kwargs=message.additional_kwargs.copy(),
example=getattr(message, "example", None),
)
num_converted += 1
messages.append(message)
return ChatSession(messages=messages)
[docs]def map_ai_messages(
chat_sessions: Iterable[ChatSession], sender: str
) -> Iterator[ChatSession]:
"""Convert messages from the specified 'sender' to AI messages.
This is useful for fine-tuning the AI to adapt to your voice.
"""
for chat_session in chat_sessions:
yield map_ai_messages_in_session(chat_session, sender) | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_loaders/utils.html |
2c178cc73461-0 | Source code for langchain.chat_loaders.whatsapp
import logging
import os
import re
import zipfile
from typing import Iterator, List, Union
from langchain.chat_loaders.base import BaseChatLoader
from langchain.schema import AIMessage, HumanMessage
from langchain.schema.chat import ChatSession
logger = logging.getLogger(__name__)
[docs]class WhatsAppChatLoader(BaseChatLoader):
"""Load `WhatsApp` conversations from a dump zip file or directory."""
[docs] def __init__(self, path: str):
"""Initialize the WhatsAppChatLoader.
Args:
path (str): Path to the exported WhatsApp chat
zip directory, folder, or file.
To generate the dump, open the chat, click the three dots in the top
right corner, and select "More". Then select "Export chat" and
choose "Without media".
"""
self.path = path
ignore_lines = [
"This message was deleted",
"<Media omitted>",
"image omitted",
"Messages and calls are end-to-end encrypted. No one outside of this chat,"
" not even WhatsApp, can read or listen to them.",
]
self._ignore_lines = re.compile(
r"(" + "|".join([r"\u200E*" + line for line in ignore_lines]) + r")",
flags=re.IGNORECASE,
)
self._message_line_regex = re.compile(
r"\u200E*\[?(\d{1,2}/\d{1,2}/\d{2,4}, \d{1,2}:\d{2}:\d{2} (?:AM|PM))\]?[ \u200E]*([^:]+): (.+)", # noqa
flags=re.IGNORECASE, | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_loaders/whatsapp.html |
2c178cc73461-1 | flags=re.IGNORECASE,
)
def _load_single_chat_session(self, file_path: str) -> ChatSession:
"""Load a single chat session from a file.
Args:
file_path (str): Path to the chat file.
Returns:
ChatSession: The loaded chat session.
"""
with open(file_path, "r", encoding="utf-8") as file:
txt = file.read()
# Split messages by newlines, but keep multi-line messages grouped
chat_lines: List[str] = []
current_message = ""
for line in txt.split("\n"):
if self._message_line_regex.match(line):
if current_message:
chat_lines.append(current_message)
current_message = line
else:
current_message += " " + line.strip()
if current_message:
chat_lines.append(current_message)
results: List[Union[HumanMessage, AIMessage]] = []
for line in chat_lines:
result = self._message_line_regex.match(line.strip())
if result:
timestamp, sender, text = result.groups()
if not self._ignore_lines.match(text.strip()):
results.append(
HumanMessage(
role=sender,
content=text,
additional_kwargs={
"sender": sender,
"events": [{"message_time": timestamp}],
},
)
)
else:
logger.debug(f"Could not parse line: {line}")
return ChatSession(messages=results)
def _iterate_files(self, path: str) -> Iterator[str]:
"""Iterate over the files in a directory or zip file.
Args:
path (str): Path to the directory or zip file. | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_loaders/whatsapp.html |
2c178cc73461-2 | Args:
path (str): Path to the directory or zip file.
Yields:
str: The path to each file.
"""
if os.path.isfile(path):
yield path
elif os.path.isdir(path):
for root, _, files in os.walk(path):
for file in files:
if file.endswith(".txt"):
yield os.path.join(root, file)
elif zipfile.is_zipfile(path):
with zipfile.ZipFile(path) as zip_file:
for file in zip_file.namelist():
if file.endswith(".txt"):
yield zip_file.extract(file)
[docs] def lazy_load(self) -> Iterator[ChatSession]:
"""Lazy load the messages from the chat file and yield
them as chat sessions.
Yields:
Iterator[ChatSession]: The loaded chat sessions.
"""
yield self._load_single_chat_session(self.path) | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_loaders/whatsapp.html |
b806c36ce6f7-0 | Source code for langchain.chat_loaders.slack
import json
import logging
import re
import zipfile
from pathlib import Path
from typing import Dict, Iterator, List, Union
from langchain.chat_loaders.base import BaseChatLoader
from langchain.schema import AIMessage, HumanMessage
from langchain.schema.chat import ChatSession
logger = logging.getLogger(__name__)
[docs]class SlackChatLoader(BaseChatLoader):
"""Load `Slack` conversations from a dump zip file."""
[docs] def __init__(
self,
path: Union[str, Path],
):
"""
Initialize the chat loader with the path to the exported Slack dump zip file.
:param path: Path to the exported Slack dump zip file.
"""
self.zip_path = path if isinstance(path, Path) else Path(path)
if not self.zip_path.exists():
raise FileNotFoundError(f"File {self.zip_path} not found")
def _load_single_chat_session(self, messages: List[Dict]) -> ChatSession:
results: List[Union[AIMessage, HumanMessage]] = []
previous_sender = None
for message in messages:
if not isinstance(message, dict):
continue
text = message.get("text", "")
timestamp = message.get("ts", "")
sender = message.get("user", "")
if not sender:
continue
skip_pattern = re.compile(
r"<@U\d+> has joined the channel", flags=re.IGNORECASE
)
if skip_pattern.match(text):
continue
if sender == previous_sender:
results[-1].content += "\n\n" + text
results[-1].additional_kwargs["events"].append(
{"message_time": timestamp}
)
else: | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_loaders/slack.html |
b806c36ce6f7-1 | {"message_time": timestamp}
)
else:
results.append(
HumanMessage(
role=sender,
content=text,
additional_kwargs={
"sender": sender,
"events": [{"message_time": timestamp}],
},
)
)
previous_sender = sender
return ChatSession(messages=results)
def _read_json(self, zip_file: zipfile.ZipFile, file_path: str) -> List[dict]:
"""Read JSON data from a zip subfile."""
with zip_file.open(file_path, "r") as f:
data = json.load(f)
if not isinstance(data, list):
raise ValueError(f"Expected list of dictionaries, got {type(data)}")
return data
[docs] def lazy_load(self) -> Iterator[ChatSession]:
"""
Lazy load the chat sessions from the Slack dump file and yield them
in the required format.
:return: Iterator of chat sessions containing messages.
"""
with zipfile.ZipFile(str(self.zip_path), "r") as zip_file:
for file_path in zip_file.namelist():
if file_path.endswith(".json"):
messages = self._read_json(zip_file, file_path)
yield self._load_single_chat_session(messages) | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_loaders/slack.html |
a3a353173816-0 | Source code for langchain.chat_loaders.telegram
import json
import logging
import os
import tempfile
import zipfile
from pathlib import Path
from typing import Iterator, List, Union
from langchain.chat_loaders.base import BaseChatLoader
from langchain.schema import AIMessage, BaseMessage, HumanMessage
from langchain.schema.chat import ChatSession
logger = logging.getLogger(__name__)
[docs]class TelegramChatLoader(BaseChatLoader):
"""Load `telegram` conversations to LangChain chat messages.
To export, use the Telegram Desktop app from
https://desktop.telegram.org/, select a conversation, click the three dots
in the top right corner, and select "Export chat history". Then select
"Machine-readable JSON" (preferred) to export. Note: the 'lite' versions of
the desktop app (like "Telegram for MacOS") do not support exporting chat
history.
"""
[docs] def __init__(
self,
path: Union[str, Path],
):
"""Initialize the TelegramChatLoader.
Args:
path (Union[str, Path]): Path to the exported Telegram chat zip,
directory, json, or HTML file.
"""
self.path = path if isinstance(path, str) else str(path)
def _load_single_chat_session_html(self, file_path: str) -> ChatSession:
"""Load a single chat session from an HTML file.
Args:
file_path (str): Path to the HTML file.
Returns:
ChatSession: The loaded chat session.
"""
try:
from bs4 import BeautifulSoup
except ImportError:
raise ImportError(
"Please install the 'beautifulsoup4' package to load"
" Telegram HTML files. You can do this by running" | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_loaders/telegram.html |
a3a353173816-1 | " Telegram HTML files. You can do this by running"
"'pip install beautifulsoup4' in your terminal."
)
with open(file_path, "r", encoding="utf-8") as file:
soup = BeautifulSoup(file, "html.parser")
results: List[Union[HumanMessage, AIMessage]] = []
previous_sender = None
for message in soup.select(".message.default"):
timestamp = message.select_one(".pull_right.date.details")["title"]
from_name_element = message.select_one(".from_name")
if from_name_element is None and previous_sender is None:
logger.debug("from_name not found in message")
continue
elif from_name_element is None:
from_name = previous_sender
else:
from_name = from_name_element.text.strip()
text = message.select_one(".text").text.strip()
results.append(
HumanMessage(
content=text,
additional_kwargs={
"sender": from_name,
"events": [{"message_time": timestamp}],
},
)
)
previous_sender = from_name
return ChatSession(messages=results)
def _load_single_chat_session_json(self, file_path: str) -> ChatSession:
"""Load a single chat session from a JSON file.
Args:
file_path (str): Path to the JSON file.
Returns:
ChatSession: The loaded chat session.
"""
with open(file_path, "r", encoding="utf-8") as file:
data = json.load(file)
messages = data.get("messages", [])
results: List[BaseMessage] = []
for message in messages:
text = message.get("text", "") | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_loaders/telegram.html |
a3a353173816-2 | for message in messages:
text = message.get("text", "")
timestamp = message.get("date", "")
from_name = message.get("from", "")
results.append(
HumanMessage(
content=text,
additional_kwargs={
"sender": from_name,
"events": [{"message_time": timestamp}],
},
)
)
return ChatSession(messages=results)
def _iterate_files(self, path: str) -> Iterator[str]:
"""Iterate over files in a directory or zip file.
Args:
path (str): Path to the directory or zip file.
Yields:
str: Path to each file.
"""
if os.path.isfile(path) and path.endswith((".html", ".json")):
yield path
elif os.path.isdir(path):
for root, _, files in os.walk(path):
for file in files:
if file.endswith((".html", ".json")):
yield os.path.join(root, file)
elif zipfile.is_zipfile(path):
with zipfile.ZipFile(path) as zip_file:
for file in zip_file.namelist():
if file.endswith((".html", ".json")):
with tempfile.TemporaryDirectory() as temp_dir:
yield zip_file.extract(file, path=temp_dir)
[docs] def lazy_load(self) -> Iterator[ChatSession]:
"""Lazy load the messages from the chat file and yield them
in as chat sessions.
Yields:
ChatSession: The loaded chat session.
"""
for file_path in self._iterate_files(self.path):
if file_path.endswith(".html"):
yield self._load_single_chat_session_html(file_path) | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_loaders/telegram.html |
a3a353173816-3 | yield self._load_single_chat_session_html(file_path)
elif file_path.endswith(".json"):
yield self._load_single_chat_session_json(file_path) | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_loaders/telegram.html |
a852be63a738-0 | Source code for langchain.chat_loaders.langsmith
from __future__ import annotations
import logging
from typing import TYPE_CHECKING, Dict, Iterable, Iterator, List, Optional, Union, cast
from langchain.chat_loaders.base import BaseChatLoader
from langchain.load import load
from langchain.schema.chat import ChatSession
if TYPE_CHECKING:
from langsmith.client import Client
from langsmith.schemas import Run
logger = logging.getLogger(__name__)
[docs]class LangSmithRunChatLoader(BaseChatLoader):
"""
Load chat sessions from a list of LangSmith "llm" runs.
Attributes:
runs (Iterable[Union[str, Run]]): The list of LLM run IDs or run objects.
client (Client): Instance of LangSmith client for fetching data.
"""
[docs] def __init__(
self, runs: Iterable[Union[str, Run]], client: Optional["Client"] = None
):
"""
Initialize a new LangSmithRunChatLoader instance.
:param runs: List of LLM run IDs or run objects.
:param client: An instance of LangSmith client, if not provided,
a new client instance will be created.
"""
from langsmith.client import Client
self.runs = runs
self.client = client or Client()
def _load_single_chat_session(self, llm_run: "Run") -> ChatSession:
"""
Convert an individual LangSmith LLM run to a ChatSession.
:param llm_run: The LLM run object.
:return: A chat session representing the run's data.
"""
chat_session = LangSmithRunChatLoader._get_messages_from_llm_run(llm_run) | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_loaders/langsmith.html |
a852be63a738-1 | functions = LangSmithRunChatLoader._get_functions_from_llm_run(llm_run)
if functions:
chat_session["functions"] = functions
return chat_session
@staticmethod
def _get_messages_from_llm_run(llm_run: "Run") -> ChatSession:
"""
Extract messages from a LangSmith LLM run.
:param llm_run: The LLM run object.
:return: ChatSession with the extracted messages.
"""
if llm_run.run_type != "llm":
raise ValueError(f"Expected run of type llm. Got: {llm_run.run_type}")
if "messages" not in llm_run.inputs:
raise ValueError(f"Run has no 'messages' inputs. Got {llm_run.inputs}")
if not llm_run.outputs:
raise ValueError("Cannot convert pending run")
messages = load(llm_run.inputs)["messages"]
message_chunk = load(llm_run.outputs)["generations"][0]["message"]
return ChatSession(messages=messages + [message_chunk])
@staticmethod
def _get_functions_from_llm_run(llm_run: "Run") -> Optional[List[Dict]]:
"""
Extract functions from a LangSmith LLM run if they exist.
:param llm_run: The LLM run object.
:return: Functions from the run or None.
"""
if llm_run.run_type != "llm":
raise ValueError(f"Expected run of type llm. Got: {llm_run.run_type}")
return (llm_run.extra or {}).get("invocation_params", {}).get("functions")
[docs] def lazy_load(self) -> Iterator[ChatSession]:
""" | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_loaders/langsmith.html |
a852be63a738-2 | [docs] def lazy_load(self) -> Iterator[ChatSession]:
"""
Lazy load the chat sessions from the iterable of run IDs.
This method fetches the runs and converts them to chat sessions on-the-fly,
yielding one session at a time.
:return: Iterator of chat sessions containing messages.
"""
from langsmith.schemas import Run
for run_obj in self.runs:
try:
if hasattr(run_obj, "id"):
run = run_obj
else:
run = self.client.read_run(run_obj)
session = self._load_single_chat_session(cast(Run, run))
yield session
except ValueError as e:
logger.warning(f"Could not load run {run_obj}: {repr(e)}")
continue
[docs]class LangSmithDatasetChatLoader(BaseChatLoader):
"""
Load chat sessions from a LangSmith dataset with the "chat" data type.
Attributes:
dataset_name (str): The name of the LangSmith dataset.
client (Client): Instance of LangSmith client for fetching data.
"""
[docs] def __init__(self, *, dataset_name: str, client: Optional["Client"] = None):
"""
Initialize a new LangSmithChatDatasetLoader instance.
:param dataset_name: The name of the LangSmith dataset.
:param client: An instance of LangSmith client; if not provided,
a new client instance will be created.
"""
try:
from langsmith.client import Client
except ImportError as e:
raise ImportError(
"The LangSmith client is required to load LangSmith datasets.\n"
"Please install it with `pip install langsmith`"
) from e | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_loaders/langsmith.html |
a852be63a738-3 | "Please install it with `pip install langsmith`"
) from e
self.dataset_name = dataset_name
self.client = client or Client()
[docs] def lazy_load(self) -> Iterator[ChatSession]:
"""
Lazy load the chat sessions from the specified LangSmith dataset.
This method fetches the chat data from the dataset and
converts each data point to chat sessions on-the-fly,
yielding one session at a time.
:return: Iterator of chat sessions containing messages.
"""
from langchain.adapters import openai as oai_adapter # noqa: E402
data = self.client.read_dataset_openai_finetuning(
dataset_name=self.dataset_name
)
for data_point in data:
yield ChatSession(
messages=[
oai_adapter.convert_dict_to_message(m)
for m in data_point.get("messages", [])
],
functions=data_point.get("functions"),
) | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_loaders/langsmith.html |
8c2b578ce10a-0 | Source code for langchain.chat_loaders.facebook_messenger
import json
import logging
from pathlib import Path
from typing import Iterator, Union
from langchain.chat_loaders.base import BaseChatLoader
from langchain.schema.chat import ChatSession
from langchain.schema.messages import HumanMessage
logger = logging.getLogger(__file__)
[docs]class SingleFileFacebookMessengerChatLoader(BaseChatLoader):
"""Load `Facebook Messenger` chat data from a single file.
Args:
path (Union[Path, str]): The path to the chat file.
Attributes:
path (Path): The path to the chat file.
"""
[docs] def __init__(self, path: Union[Path, str]) -> None:
super().__init__()
self.file_path = path if isinstance(path, Path) else Path(path)
[docs] def lazy_load(self) -> Iterator[ChatSession]:
"""Lazy loads the chat data from the file.
Yields:
ChatSession: A chat session containing the loaded messages.
"""
with open(self.file_path) as f:
data = json.load(f)
sorted_data = sorted(data["messages"], key=lambda x: x["timestamp_ms"])
messages = []
for m in sorted_data:
messages.append(
HumanMessage(
content=m["content"], additional_kwargs={"sender": m["sender_name"]}
)
)
yield ChatSession(messages=messages)
[docs]class FolderFacebookMessengerChatLoader(BaseChatLoader):
"""Load `Facebook Messenger` chat data from a folder.
Args:
path (Union[str, Path]): The path to the directory
containing the chat files.
Attributes:
path (Path): The path to the directory containing the chat files. | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_loaders/facebook_messenger.html |
8c2b578ce10a-1 | Attributes:
path (Path): The path to the directory containing the chat files.
"""
[docs] def __init__(self, path: Union[str, Path]) -> None:
super().__init__()
self.directory_path = Path(path) if isinstance(path, str) else path
[docs] def lazy_load(self) -> Iterator[ChatSession]:
"""Lazy loads the chat data from the folder.
Yields:
ChatSession: A chat session containing the loaded messages.
"""
inbox_path = self.directory_path / "inbox"
for _dir in inbox_path.iterdir():
if _dir.is_dir():
for _file in _dir.iterdir():
if _file.suffix.lower() == ".json":
file_loader = SingleFileFacebookMessengerChatLoader(path=_file)
for result in file_loader.lazy_load():
yield result | lang/api.python.langchain.com/en/latest/_modules/langchain/chat_loaders/facebook_messenger.html |
62ef9e7e024b-0 | Source code for langchain.schema.chat
from typing import Sequence, TypedDict
from langchain.schema import BaseMessage
[docs]class ChatSession(TypedDict, total=False):
"""Chat Session represents a single
conversation, channel, or other group of messages."""
messages: Sequence[BaseMessage]
"""The LangChain chat messages loaded from the source."""
functions: Sequence[dict]
"""The function calling specs for the messages.""" | lang/api.python.langchain.com/en/latest/_modules/langchain/schema/chat.html |
0e2b255b4cc9-0 | Source code for langchain.schema.agent
from __future__ import annotations
from typing import Any, Literal, Sequence, Union
from langchain.load.serializable import Serializable
from langchain.schema.messages import BaseMessage
[docs]class AgentAction(Serializable):
"""A full description of an action for an ActionAgent to execute."""
tool: str
"""The name of the Tool to execute."""
tool_input: Union[str, dict]
"""The input to pass in to the Tool."""
log: str
"""Additional information to log about the action.
This log can be used in a few ways. First, it can be used to audit
what exactly the LLM predicted to lead to this (tool, tool_input).
Second, it can be used in future iterations to show the LLMs prior
thoughts. This is useful when (tool, tool_input) does not contain
full information about the LLM prediction (for example, any `thought`
before the tool/tool_input)."""
type: Literal["AgentAction"] = "AgentAction"
def __init__(
self, tool: str, tool_input: Union[str, dict], log: str, **kwargs: Any
):
"""Override init to support instantiation by position for backward compat."""
super().__init__(tool=tool, tool_input=tool_input, log=log, **kwargs)
[docs] @classmethod
def is_lc_serializable(cls) -> bool:
"""Return whether or not the class is serializable."""
return True
[docs]class AgentActionMessageLog(AgentAction):
message_log: Sequence[BaseMessage]
"""Similar to log, this can be used to pass along extra
information about what exact messages were predicted by the LLM | lang/api.python.langchain.com/en/latest/_modules/langchain/schema/agent.html |
0e2b255b4cc9-1 | information about what exact messages were predicted by the LLM
before parsing out the (tool, tool_input). This is again useful
if (tool, tool_input) cannot be used to fully recreate the LLM
prediction, and you need that LLM prediction (for future agent iteration).
Compared to `log`, this is useful when the underlying LLM is a
ChatModel (and therefore returns messages rather than a string)."""
# Ignoring type because we're overriding the type from AgentAction.
# And this is the correct thing to do in this case.
# The type literal is used for serialization purposes.
type: Literal["AgentActionMessageLog"] = "AgentActionMessageLog" # type: ignore
[docs]class AgentFinish(Serializable):
"""The final return value of an ActionAgent."""
return_values: dict
"""Dictionary of return values."""
log: str
"""Additional information to log about the return value.
This is used to pass along the full LLM prediction, not just the parsed out
return value. For example, if the full LLM prediction was
`Final Answer: 2` you may want to just return `2` as a return value, but pass
along the full string as a `log` (for debugging or observability purposes).
"""
type: Literal["AgentFinish"] = "AgentFinish"
def __init__(self, return_values: dict, log: str, **kwargs: Any):
"""Override init to support instantiation by position for backward compat."""
super().__init__(return_values=return_values, log=log, **kwargs)
[docs] @classmethod
def is_lc_serializable(cls) -> bool:
"""Return whether or not the class is serializable.""" | lang/api.python.langchain.com/en/latest/_modules/langchain/schema/agent.html |
0e2b255b4cc9-2 | """Return whether or not the class is serializable."""
return True | lang/api.python.langchain.com/en/latest/_modules/langchain/schema/agent.html |
4584d22dff93-0 | Source code for langchain.schema.document
from __future__ import annotations
import asyncio
from abc import ABC, abstractmethod
from functools import partial
from typing import Any, Literal, Sequence
from langchain.load.serializable import Serializable
from langchain.pydantic_v1 import Field
[docs]class Document(Serializable):
"""Class for storing a piece of text and associated metadata."""
page_content: str
"""String text."""
metadata: dict = Field(default_factory=dict)
"""Arbitrary metadata about the page content (e.g., source, relationships to other
documents, etc.).
"""
type: Literal["Document"] = "Document"
[docs] @classmethod
def is_lc_serializable(cls) -> bool:
"""Return whether this class is serializable."""
return True
[docs]class BaseDocumentTransformer(ABC):
"""Abstract base class for document transformation systems.
A document transformation system takes a sequence of Documents and returns a
sequence of transformed Documents.
Example:
.. code-block:: python
class EmbeddingsRedundantFilter(BaseDocumentTransformer, BaseModel):
embeddings: Embeddings
similarity_fn: Callable = cosine_similarity
similarity_threshold: float = 0.95
class Config:
arbitrary_types_allowed = True
def transform_documents(
self, documents: Sequence[Document], **kwargs: Any
) -> Sequence[Document]:
stateful_documents = get_stateful_documents(documents)
embedded_documents = _get_embeddings_from_stateful_docs(
self.embeddings, stateful_documents
)
included_idxs = _filter_similar_embeddings(
embedded_documents, self.similarity_fn, self.similarity_threshold
)
return [stateful_documents[i] for i in sorted(included_idxs)] | lang/api.python.langchain.com/en/latest/_modules/langchain/schema/document.html |
4584d22dff93-1 | )
return [stateful_documents[i] for i in sorted(included_idxs)]
async def atransform_documents(
self, documents: Sequence[Document], **kwargs: Any
) -> Sequence[Document]:
raise NotImplementedError
""" # noqa: E501
[docs] @abstractmethod
def transform_documents(
self, documents: Sequence[Document], **kwargs: Any
) -> Sequence[Document]:
"""Transform a list of documents.
Args:
documents: A sequence of Documents to be transformed.
Returns:
A list of transformed Documents.
"""
[docs] async def atransform_documents(
self, documents: Sequence[Document], **kwargs: Any
) -> Sequence[Document]:
"""Asynchronously transform a list of documents.
Args:
documents: A sequence of Documents to be transformed.
Returns:
A list of transformed Documents.
"""
return await asyncio.get_running_loop().run_in_executor(
None, partial(self.transform_documents, **kwargs), documents
) | lang/api.python.langchain.com/en/latest/_modules/langchain/schema/document.html |
4e647ed1cf51-0 | Source code for langchain.schema.cache
from __future__ import annotations
from abc import ABC, abstractmethod
from typing import Any, Optional, Sequence
from langchain.schema.output import Generation
RETURN_VAL_TYPE = Sequence[Generation]
[docs]class BaseCache(ABC):
"""Base interface for cache."""
[docs] @abstractmethod
def lookup(self, prompt: str, llm_string: str) -> Optional[RETURN_VAL_TYPE]:
"""Look up based on prompt and llm_string."""
[docs] @abstractmethod
def update(self, prompt: str, llm_string: str, return_val: RETURN_VAL_TYPE) -> None:
"""Update cache based on prompt and llm_string."""
[docs] @abstractmethod
def clear(self, **kwargs: Any) -> None:
"""Clear cache that can take additional keyword arguments.""" | lang/api.python.langchain.com/en/latest/_modules/langchain/schema/cache.html |
61ec9d2f588e-0 | Source code for langchain.schema.prompt_template
from __future__ import annotations
import json
from abc import ABC, abstractmethod
from pathlib import Path
from typing import Any, Callable, Dict, List, Mapping, Optional, Type, Union
import yaml
from langchain.pydantic_v1 import BaseModel, Field, create_model, root_validator
from langchain.schema.document import Document
from langchain.schema.output_parser import BaseOutputParser
from langchain.schema.prompt import PromptValue
from langchain.schema.runnable import RunnableConfig, RunnableSerializable
[docs]class BasePromptTemplate(RunnableSerializable[Dict, PromptValue], ABC):
"""Base class for all prompt templates, returning a prompt."""
input_variables: List[str]
"""A list of the names of the variables the prompt template expects."""
input_types: Dict[str, Any] = Field(default_factory=dict)
"""A dictionary of the types of the variables the prompt template expects.
If not provided, all variables are assumed to be strings."""
output_parser: Optional[BaseOutputParser] = None
"""How to parse the output of calling an LLM on this formatted prompt."""
partial_variables: Mapping[str, Union[str, Callable[[], str]]] = Field(
default_factory=dict
)
[docs] @classmethod
def is_lc_serializable(cls) -> bool:
"""Return whether this class is serializable."""
return True
class Config:
"""Configuration for this pydantic object."""
arbitrary_types_allowed = True
@property
def OutputType(self) -> Any:
from langchain.prompts.base import StringPromptValue
from langchain.prompts.chat import ChatPromptValueConcrete
return Union[StringPromptValue, ChatPromptValueConcrete]
[docs] def get_input_schema( | lang/api.python.langchain.com/en/latest/_modules/langchain/schema/prompt_template.html |
61ec9d2f588e-1 | [docs] def get_input_schema(
self, config: Optional[RunnableConfig] = None
) -> Type[BaseModel]:
# This is correct, but pydantic typings/mypy don't think so.
return create_model( # type: ignore[call-overload]
"PromptInput",
**{k: (self.input_types.get(k, str), None) for k in self.input_variables},
)
[docs] def invoke(
self, input: Dict, config: Optional[RunnableConfig] = None
) -> PromptValue:
return self._call_with_config(
lambda inner_input: self.format_prompt(
**{key: inner_input[key] for key in self.input_variables}
),
input,
config,
run_type="prompt",
)
[docs] @abstractmethod
def format_prompt(self, **kwargs: Any) -> PromptValue:
"""Create Chat Messages."""
@root_validator()
def validate_variable_names(cls, values: Dict) -> Dict:
"""Validate variable names do not include restricted names."""
if "stop" in values["input_variables"]:
raise ValueError(
"Cannot have an input variable named 'stop', as it is used internally,"
" please rename."
)
if "stop" in values["partial_variables"]:
raise ValueError(
"Cannot have an partial variable named 'stop', as it is used "
"internally, please rename."
)
overall = set(values["input_variables"]).intersection(
values["partial_variables"]
)
if overall:
raise ValueError(
f"Found overlapping input and partial variables: {overall}"
)
return values | lang/api.python.langchain.com/en/latest/_modules/langchain/schema/prompt_template.html |
61ec9d2f588e-2 | )
return values
[docs] def partial(self, **kwargs: Union[str, Callable[[], str]]) -> BasePromptTemplate:
"""Return a partial of the prompt template."""
prompt_dict = self.__dict__.copy()
prompt_dict["input_variables"] = list(
set(self.input_variables).difference(kwargs)
)
prompt_dict["partial_variables"] = {**self.partial_variables, **kwargs}
return type(self)(**prompt_dict)
def _merge_partial_and_user_variables(self, **kwargs: Any) -> Dict[str, Any]:
# Get partial params:
partial_kwargs = {
k: v if isinstance(v, str) else v()
for k, v in self.partial_variables.items()
}
return {**partial_kwargs, **kwargs}
[docs] @abstractmethod
def format(self, **kwargs: Any) -> str:
"""Format the prompt with the inputs.
Args:
kwargs: Any arguments to be passed to the prompt template.
Returns:
A formatted string.
Example:
.. code-block:: python
prompt.format(variable1="foo")
"""
@property
def _prompt_type(self) -> str:
"""Return the prompt type key."""
raise NotImplementedError
[docs] def dict(self, **kwargs: Any) -> Dict:
"""Return dictionary representation of prompt."""
prompt_dict = super().dict(**kwargs)
try:
prompt_dict["_type"] = self._prompt_type
except NotImplementedError:
pass
return prompt_dict
[docs] def save(self, file_path: Union[Path, str]) -> None:
"""Save the prompt.
Args: | lang/api.python.langchain.com/en/latest/_modules/langchain/schema/prompt_template.html |
61ec9d2f588e-3 | """Save the prompt.
Args:
file_path: Path to directory to save prompt to.
Example:
.. code-block:: python
prompt.save(file_path="path/prompt.yaml")
"""
if self.partial_variables:
raise ValueError("Cannot save prompt with partial variables.")
# Fetch dictionary to save
prompt_dict = self.dict()
if "_type" not in prompt_dict:
raise NotImplementedError(f"Prompt {self} does not support saving.")
# Convert file to Path object.
if isinstance(file_path, str):
save_path = Path(file_path)
else:
save_path = file_path
directory_path = save_path.parent
directory_path.mkdir(parents=True, exist_ok=True)
if save_path.suffix == ".json":
with open(file_path, "w") as f:
json.dump(prompt_dict, f, indent=4)
elif save_path.suffix == ".yaml":
with open(file_path, "w") as f:
yaml.dump(prompt_dict, f, default_flow_style=False)
else:
raise ValueError(f"{save_path} must be json or yaml")
[docs]def format_document(doc: Document, prompt: BasePromptTemplate) -> str:
"""Format a document into a string based on a prompt template.
First, this pulls information from the document from two sources:
1. `page_content`:
This takes the information from the `document.page_content`
and assigns it to a variable named `page_content`.
2. metadata:
This takes information from `document.metadata` and assigns
it to variables of the same name.
Those variables are then passed into the `prompt` to produce a formatted string.
Args: | lang/api.python.langchain.com/en/latest/_modules/langchain/schema/prompt_template.html |
61ec9d2f588e-4 | Args:
doc: Document, the page_content and metadata will be used to create
the final string.
prompt: BasePromptTemplate, will be used to format the page_content
and metadata into the final string.
Returns:
string of the document formatted.
Example:
.. code-block:: python
from langchain.schema import Document
from langchain.prompts import PromptTemplate
doc = Document(page_content="This is a joke", metadata={"page": "1"})
prompt = PromptTemplate.from_template("Page {page}: {page_content}")
format_document(doc, prompt)
>>> "Page 1: This is a joke"
"""
base_info = {"page_content": doc.page_content, **doc.metadata}
missing_metadata = set(prompt.input_variables).difference(base_info)
if len(missing_metadata) > 0:
required_metadata = [
iv for iv in prompt.input_variables if iv != "page_content"
]
raise ValueError(
f"Document prompt requires documents to have metadata variables: "
f"{required_metadata}. Received document with missing metadata: "
f"{list(missing_metadata)}."
)
document_info = {k: base_info[k] for k in prompt.input_variables}
return prompt.format(**document_info) | lang/api.python.langchain.com/en/latest/_modules/langchain/schema/prompt_template.html |
7e5261611c0b-0 | Source code for langchain.schema.exceptions
[docs]class LangChainException(Exception):
"""General LangChain exception.""" | lang/api.python.langchain.com/en/latest/_modules/langchain/schema/exceptions.html |
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