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""" |
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Custom Langchain prompt templates |
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""" |
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from langchain.prompts import PromptTemplate |
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def create_qa_prompt() -> PromptTemplate: |
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""" |
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Prompt for retrieval QA chain |
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""" |
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template = """\n\nHuman: Use the following pieces of context to answer the question at the end. If answer is not clear, say I DON"T KNOW |
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{context} |
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Question: {question} |
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\n\nAssistant: |
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Answer:""" |
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return PromptTemplate(template=template, input_variables=["context", "question"]) |
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def create_agent_prompt() -> PromptTemplate: |
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""" |
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Prompt for the agent |
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""" |
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prefix = """\n\nHuman: Answer the following questions as best you can. You have access to the following tools:""" |
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format_instructions = """Use the following format: |
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Question: the input question you must answer |
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Thought: you should always think about what to do |
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Action: the action to take, should be one of [{tool_names}] |
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Action Input: the input to the action |
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Observation: the result of the action |
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... (this Thought/Action/Action Input/Observation can repeat N times) |
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Thought: I now know the final answer |
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Final Answer: the final answer to the original input question""" |
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suffix = """Begin! |
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Question: {input} |
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\n\nAssistant: |
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Thought: {agent_scratchpad} |
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""" |
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return prefix, format_instructions, suffix |
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