Source code for langchain.model_laboratory

"""尝试不同的模型。"""

from __future__ import annotations

from typing import List, Optional, Sequence

from langchain_core.language_models.llms import BaseLLM
from langchain_core.prompts.prompt import PromptTemplate
from langchain_core.utils.input import get_color_mapping, print_text

from langchain.chains.base import Chain
from langchain.chains.llm import LLMChain


[docs]class ModelLaboratory: """尝试不同的模型。"""
[docs] def __init__(self, chains: Sequence[Chain], names: Optional[List[str]] = None): """初始化链以进行实验。 参数: chains:要进行实验的链列表。 """ for chain in chains: if not isinstance(chain, Chain): raise ValueError( "ModelLaboratory should now be initialized with Chains. " "If you want to initialize with LLMs, use the `from_llms` method " "instead (`ModelLaboratory.from_llms(...)`)" ) if len(chain.input_keys) != 1: raise ValueError( "Currently only support chains with one input variable, " f"got {chain.input_keys}" ) if len(chain.output_keys) != 1: raise ValueError( "Currently only support chains with one output variable, " f"got {chain.output_keys}" ) if names is not None: if len(names) != len(chains): raise ValueError("Length of chains does not match length of names.") self.chains = chains chain_range = [str(i) for i in range(len(self.chains))] self.chain_colors = get_color_mapping(chain_range) self.names = names
[docs] @classmethod def from_llms( cls, llms: List[BaseLLM], prompt: Optional[PromptTemplate] = None ) -> ModelLaboratory: """使用LLMs进行实验的初始化和可选提示。 参数: llms:要进行实验的LLMs列表 prompt:要用于提示LLMs的可选提示。默认为None。 如果提供了提示,则应该只有一个输入变量。 """ if prompt is None: prompt = PromptTemplate(input_variables=["_input"], template="{_input}") chains = [LLMChain(llm=llm, prompt=prompt) for llm in llms] names = [str(llm) for llm in llms] return cls(chains, names=names)
[docs] def compare(self, text: str) -> None: """比较模型在输入文本上的输出。 如果在启动实验室时提供了提示,则该文本将被输入到提示中。如果没有提供提示,则输入文本就是整个提示。 参数: text:要在所有模型上运行的输入文本。 """ print(f"\033[1mInput:\033[0m\n{text}\n") # noqa: T201 for i, chain in enumerate(self.chains): if self.names is not None: name = self.names[i] else: name = str(chain) print_text(name, end="\n") output = chain.run(text) print_text(output, color=self.chain_colors[str(i)], end="\n\n")