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从_ 消息、 从_ template、 格式、 格式、 语言格式、 语言格式来发布什么信息? 有人能简化吗?
原标题:what are from_messages, from_template, format, format_messages in language? Can someone simplify?


我试着读了医生,但无法理解太多。 任何引用博客或链接的参考都会有所帮助。



您应该去源代码执行。 在代码中, 他们评论出来, 您也可以看到正在发生什么。 这些方法实际上正在以额外的配置和验证来即时处理类实例。 例如, 如果您查看执行 < code> from_ messages 的 < messages 执行 :

    def from_messages(
        messages: Sequence[
                Tuple[str, str],
                Tuple[Type, str],
    ) -> ChatPromptTemplate:
        """Create a chat prompt template from a variety of message formats.


            Instantiation from a list of message templates:

            .. code-block:: python

                template = ChatPromptTemplate.from_messages([
                    ("human", "Hello, how are you?"),
                    ("ai", "I m doing well, thanks!"),
                    ("human", "That s good to hear."),

            Instantiation from mixed message formats:

            .. code-block:: python

                template = ChatPromptTemplate.from_messages([
                    ("human", "Hello, how are you?"),

            messages: sequence of message representations.
                  A message can be represented using the following formats:
                  (1) BaseMessagePromptTemplate, (2) BaseMessage, (3) 2-tuple of
                  (message type, template); e.g., ("human", "{user_input}"),
                  (4) 2-tuple of (message class, template), (4) a string which is
                  shorthand for ("human", template); e.g., "{user_input}"

            a chat prompt template
        _messages = [_convert_to_message(message) for message in messages]

        # Automatically infer input variables from messages
        input_vars = set()
        for _message in _messages:
            if isinstance(
                _message, (BaseChatPromptTemplate, BaseMessagePromptTemplate)

        return cls(input_variables=sorted(input_vars), messages=_messages)


  • 首先使用 帮助程序,它将每条消息转换为标准格式,供聊天PromptTemplate类使用

  • 然后使用 input_vars = set 来删除重复的信件。

  • input_evilables 是信件模板中的占位符, 当使用模板时将替换为实际值。 例如, 信件可能有“ 你好, {user_ name} ” 这样的模板, 即 {user_ name} 是一个输入变量 。

  • 然后检查他们接受何种消息 : BaseChatPhamptTemplate, baseMessagePromptTemplate

收集所有独特的输入变量后, 它返回

   return cls(input_variables=sorted(input_vars), messages=_messages)

此行创建并返回一个 ChattPromptTemplate 实例, 使用推断输入变量和已处理的信件 。

这是来自_template 方法的 :

    def from_template(
        cls: Type[MessagePromptTemplateT],
        template: str,
        template_format: str = "f-string",
        **kwargs: Any,
    ) -> MessagePromptTemplateT:
        """Create a class from a string template.

            template: a template.
            template_format: format of the template.
            **kwargs: keyword arguments to pass to the constructor.

            A new instance of this class.
        prompt = PromptTemplate.from_template(template, template_format=template_format)
        return cls(prompt=prompt, **kwargs)

from_template 需要一个单一的模板字符串(和可选格式)来创建实例。 from_messages 需要不同格式的顺序信息来创建实例。

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