动态从多个提示中选择 multi_prompt_router

本笔记本演示了如何使用 RouterChain 范式创建一个动态选择要用于给定输入的提示的链。具体来说，我们展示了如何使用 MultiPromptChain 创建一个问题回答链，该链选择与给定问题最相关的提示，然后使用该提示来回答问题。

from langchain.chains.router import MultiPromptChain
from langchain.llms import OpenAI

physics_template = """You are a very smart physics professor. \
You are great at answering questions about physics in a concise and easy to understand manner. \
When you don't know the answer to a question you admit that you don't know.

Here is a question:
{input}"""


math_template = """You are a very good mathematician. You are great at answering math questions. \
You are so good because you are able to break down hard problems into their component parts, \
answer the component parts, and then put them together to answer the broader question.

Here is a question:
{input}"""

prompt_infos = [
    {
        "name": "physics", 
        "description": "Good for answering questions about physics", 
        "prompt_template": physics_template
    },
    {
        "name": "math", 
        "description": "Good for answering math questions", 
        "prompt_template": math_template
    }
]

chain = MultiPromptChain.from_prompts(OpenAI(), prompt_infos, verbose=True)

print(chain.run("What is black body radiation?"))

    
    
    > Entering new MultiPromptChain chain...
    physics: {'input': 'What is black body radiation?'}
    > Finished chain.
    
    
    Black body radiation is the emission of electromagnetic radiation from a body due to its temperature. It is a type of thermal radiation that is emitted from the surface of all objects that are at a temperature above absolute zero. It is a spectrum of radiation that is influenced by the temperature of the body and is independent of the composition of the emitting material.

print(chain.run("What is the first prime number greater than 40 such that one plus the prime number is divisible by 3"))

    
    
    > Entering new MultiPromptChain chain...
    math: {'input': 'What is the first prime number greater than 40 such that one plus the prime number is divisible by 3'}
    > Finished chain.
    ?
    
    The first prime number greater than 40 such that one plus the prime number is divisible by 3 is 43. To solve this problem, we can break down the question into two parts: finding the first prime number greater than 40, and then finding a number that is divisible by 3. 
    
    The first step is to find the first prime number greater than 40. A prime number is a number that is only divisible by 1 and itself. The next prime number after 40 is 41.
    
    The second step is to find a number that is divisible by 3. To do this, we can add 1 to 41, which gives us 42. Now, we can check if 42 is divisible by 3. 42 divided by 3 is 14, so 42 is divisible by 3.
    
    Therefore, the answer to the question is 43.

print(chain.run("What is the name of the type of cloud that rins"))

    
    
    > Entering new MultiPromptChain chain...
    None: {'input': 'What is the name of the type of cloud that rains?'}
    > Finished chain.
    The type of cloud that typically produces rain is called a cumulonimbus cloud. This type of cloud is characterized by its large vertical extent and can produce thunderstorms and heavy precipitation. Is there anything else you'd like to know?