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添加记忆（state）

LangChain

链组件可以使用 Memory 对象进行初始化，该对象将在对链组件的多次调用之间保留数据。这使得链组件具有状态。

API chains

入门​

from langchain.chains import ConversationChain
from langchain.memory import ConversationBufferMemory

conversation = ConversationChain(
    llm=chat,
    memory=ConversationBufferMemory()
)

conversation.run("Answer briefly. What are the first 3 colors of a rainbow?")
# -> The first three colors of a rainbow are red, orange, and yellow.
conversation.run("And the next 4?")
# -> The next four colors of a rainbow are green, blue, indigo, and violet.
    'The next four colors of a rainbow are green, blue, indigo, and violet.'

基本上，BaseMemory 定义了 langchain 存储内存的接口。它通过 load_memory_variables 方法读取存储的数据，并通过 save_context 方法存储新数据。您可以在 Memory 部分了解更多信息。