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import requests |
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import json |
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import re |
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def extract_between_tags(text, start_tag, end_tag): |
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start_index = text.find(start_tag) |
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end_index = text.find(end_tag, start_index) |
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return text[start_index+len(start_tag):end_index-len(end_tag)] |
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class VectaraQuery(): |
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def __init__(self, api_key: str, customer_id: str, corpus_id: str, prompt_name: str = None): |
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self.customer_id = customer_id |
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self.corpus_id = corpus_id |
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self.api_key = api_key |
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self.prompt_name = prompt_name if prompt_name else "vectara-experimental-summary-ext-2023-12-11-large" |
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self.conv_id = None |
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def get_body(self, user_response: str): |
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corpora_key_list = [{ |
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'customer_id': self.customer_id, 'corpus_id': self.corpus_id, 'lexical_interpolation_config': {'lambda': 0.025} |
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}] |
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user_response = user_response.replace('"', '\\"') |
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prompt = f''' |
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[ |
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{{ |
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"role": "system", |
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"content": "You are an assistant that provides information about drink names based on a given corpus. \ |
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Format the response in the following way:\n\ |
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Reason: <reason why the name cannot be used>\n\ |
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Alternative: <alternative name>\n\ |
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Notes: <additional notes>\n\n\ |
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Example:\n\ |
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Reason: The name 'Vodka Sunrise' cannot be used because it is trademarked.\n\ |
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Alternative: Use 'Morning Delight' instead.\n\ |
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Notes: Ensure the drink contains vodka to match the alternative name." |
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}}, |
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{{ |
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"role": "user", |
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"content": "{user_response}" |
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}} |
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] |
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''' |
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return { |
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'query': [ |
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{ |
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'query': user_response, |
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'start': 0, |
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'numResults': 10, |
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'corpusKey': corpora_key_list, |
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'context_config': { |
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'sentences_before': 2, |
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'sentences_after': 2, |
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'start_tag': "%START_SNIPPET%", |
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'end_tag': "%END_SNIPPET%", |
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} |
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} |
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] |
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} |
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def get_headers(self): |
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return { |
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"Content-Type": "application/json", |
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"Accept": "application/json", |
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"customer-id": self.customer_id, |
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"x-api-key": self.api_key, |
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"grpc-timeout": "60S" |
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} |
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def submit_query(self, query_str: str): |
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endpoint = f"https://api.vectara.io/v1/stream-query" |
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body = self.get_body(query_str) |
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response = requests.post(endpoint, data=json.dumps(body), verify=True, headers=self.get_headers(), stream=True) |
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if response.status_code != 200: |
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print(f"Query failed with code {response.status_code}, reason {response.reason}, text {response.text}") |
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return "Sorry, something went wrong. Please try again later." |
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accumulated_text = "" |
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for line in response.iter_lines(): |
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if line: |
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data = json.loads(line.decode('utf-8')) |
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print(f"Received data chunk: {json.dumps(data, indent=2)}") |
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if 'result' not in data: |
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print("No 'result' in data") |
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continue |
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res = data['result'] |
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if 'responseSet' not in res: |
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print("No 'responseSet' in result") |
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continue |
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response_set = res['responseSet'] |
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if response_set: |
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for result in response_set['response']: |
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if 'text' not in result: |
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print("No 'text' in result") |
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continue |
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text = result['text'] |
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print(f"Processing text: {text}") |
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accumulated_text += text + " " |
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if accumulated_text: |
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return self.format_response_using_vectara(accumulated_text) |
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return "No relevant information found." |
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def format_response_using_vectara(self, text): |
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endpoint = f"https://api.vectara.io/v1/stream-summary" |
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body = { |
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'text': text, |
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'summary': { |
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'responseLang': 'eng', |
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'maxSummarizedResults': 1, |
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'summarizerPromptName': self.prompt_name, |
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'promptText': f''' |
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[ |
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{{ |
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"role": "system", |
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"content": "You are an assistant that provides information about drink names based on a given corpus. \ |
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Format the response in the following way:\n\ |
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Reason: <reason why the name cannot be used>\n\ |
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Alternative: <alternative name>\n\ |
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Notes: <additional notes>\n\n\ |
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Example:\n\ |
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Reason: The name 'Vodka Sunrise' cannot be used because it is trademarked.\n\ |
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Alternative: Use 'Morning Delight' instead.\n\ |
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Notes: Ensure the drink contains vodka to match the alternative name." |
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}}, |
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{{ |
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"role": "user", |
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"content": "{text}" |
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}} |
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] |
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''' |
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} |
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} |
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headers = self.get_headers() |
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response = requests.post(endpoint, data=json.dumps(body), headers=headers) |
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if response.status_code != 200: |
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print(f"Summary query failed with code {response.status_code}, reason {response.reason}, text {response.text}") |
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return "Sorry, something went wrong. Please try again later." |
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data = response.json() |
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if 'summary' in data: |
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return data['summary']['text'] |
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return "No relevant information found." |
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