Upload app_new.py

app_new.py

@@ -0,0 +1,140 @@
+import torch
+import transformers
+from transformers import RagRetriever, RagSequenceForGeneration, AutoTokenizer, AutoModelForCausalLM
+import gradio as gr
+
+device = 'cuda' if torch.cuda.is_available() else 'cpu'
+
+
+dataset_path = "./5k_index_data/my_knowledge_dataset"
+index_path = "./5k_index_data/my_knowledge_dataset_hnsw_index.faiss"
+
+tokenizer = AutoTokenizer.from_pretrained("facebook/rag-sequence-nq")
+retriever = RagRetriever.from_pretrained("facebook/rag-sequence-nq", index_name="custom",
+                                            passages_path = dataset_path,
+                                            index_path = index_path,
+                                            n_docs = 5)
+rag_model = RagSequenceForGeneration.from_pretrained('facebook/rag-sequence-nq', retriever=retriever)
+rag_model.retriever.init_retrieval()
+rag_model.to(device)
+model = AutoModelForCausalLM.from_pretrained('google/gemma-2-9b-it',
+                              device_map = 'auto',
+                              torch_dtype = torch.bfloat16,
+                             )
+
+
+
+def strip_title(title):
+    if title.startswith('"'):
+        title = title[1:]
+    if title.endswith('"'):
+        title = title[:-1]
+    
+    return title
+
+# getting the correct format to input in gemma model
+def input_format(query, context):
+    sys_instruction = f'Context:\n {context} \n Given the following information, generate answer to the question. Provide links in the answer from the information to increase credebility.'
+    message = f'Question: {query}'
+
+    return f'<bos><start_of_turn>\n{sys_instruction}' + f' {message}<end_of_turn>\n'
+
+# retrieving and generating  answer in one call
+def retrieved_info(query, rag_model = rag_model, generating_model = model):
+    # Tokenize Query
+    retriever_input_ids = rag_model.retriever.question_encoder_tokenizer.batch_encode_plus(
+        [query],
+        return_tensors = 'pt',
+        padding = True,
+        truncation = True,
+    )['input_ids'].to(device)
+
+    # Retrieve Documents
+    question_encoder_output = rag_model.rag.question_encoder(retriever_input_ids)
+    question_encoder_pool_output = question_encoder_output[0]
+
+    result = rag_model.retriever(
+        retriever_input_ids,
+        question_encoder_pool_output.cpu().detach().to(torch.float32).numpy(),
+        prefix = rag_model.rag.generator.config.prefix,
+        n_docs = rag_model.config.n_docs,
+        return_tensors = 'pt',
+    )
+
+    # Preparing query and retrieved docs for model
+    all_docs = rag_model.retriever.index.get_doc_dicts(result.doc_ids)
+    retrieved_context = []
+    for docs in all_docs:
+        titles = [strip_title(title) for title in docs['title']]
+        texts = docs['text']
+        for title, text in zip(titles, texts):
+            retrieved_context.append(f'{title}: {text}')
+
+    generation_model_input = input_format(query, retrieved_context)
+
+    # Generating answer using gemma model
+    tokenizer = AutoTokenizer.from_pretrained("google/gemma-2-9b-it")
+    input_ids = tokenizer(generation_model_input, return_tensors='pt').to(device)
+    output = generating_model.generate(input_ids, max_new_tokens = 512)
+    
+    return tokenizer.decode(output[0])
+
+
+
+
+
+
+def respond(
+    message,
+    history: list[tuple[str, str]],
+    system_message,
+    max_tokens ,
+    temperature,
+    top_p,
+):
+    if message:  # If there's a user query
+        response = retrieved_info(message)  # Get the answer from your local FAISS and Q&A model
+        return response
+
+    # In case no message, return an empty string
+    return ""
+
+
+
+"""
+For information on how to customize the ChatInterface, peruse the gradio docs: https://www.gradio.app/docs/chatinterface
+"""
+# Custom title and description
+title = "🧠 Welcome to Your AI Knowledge Assistant"
+description = """
+HI!!, I am your loyal assistant, y functionality is based on RAG model, I retrieves relevant information and provide answers based on that. Ask me any question, and let me assist you.
+My capabilities are limited because I am still in development phase. I will do my best to assist you. SOOO LET'S BEGGINNNN......
+"""
+
+demo = gr.ChatInterface(
+    respond,
+    type = 'messages',
+    additional_inputs=[
+        gr.Textbox(value="You are a helpful and friendly assistant.", label="System message"),
+        gr.Slider(minimum=1, maximum=2048, value=512, step=1, label="Max new tokens"),
+        gr.Slider(minimum=0.1, maximum=4.0, value=0.7, step=0.1, label="Temperature"),
+        gr.Slider(
+            minimum=0.1,
+            maximum=1.0,
+            value=0.95,
+            step=0.05,
+            label="Top-p (nucleus sampling)",
+        ),
+    ],
+    title=title,
+    description=description,
+    textbox=gr.Textbox(placeholder=["'What is the future of AI?' or 'App Development'"]),
+    examples=[["✨Future of AI"], ["📱App Development"]],
+    example_icons=["🤖", "📱"],
+    theme="compact",
+)
+
+
+if __name__ == "__main__":
+    demo.launch(share = True )
+