请告诉我何时使用以及为什么使用上述功能的背景?
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。
提前感谢。
请告诉我何时使用以及为什么使用上述功能的背景?
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。
提前感谢。
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 :
@classmethod
def from_messages(
cls,
messages: Sequence[
Union[
BaseMessagePromptTemplate,
BaseChatPromptTemplate,
BaseMessage,
Tuple[str, str],
Tuple[Type, str],
str,
]
],
) -> ChatPromptTemplate:
"""Create a chat prompt template from a variety of message formats.
Examples:
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([
SystemMessage(content="hello"),
("human", "Hello, how are you?"),
])
Args:
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}"
Returns:
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)
):
input_vars.update(_message.input_variables)
return cls(input_variables=sorted(input_vars), messages=_messages)
此方法,
首先使用
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 :
@classmethod
def from_template(
cls: Type[MessagePromptTemplateT],
template: str,
template_format: str = "f-string",
**kwargs: Any,
) -> MessagePromptTemplateT:
"""Create a class from a string template.
Args:
template: a template.
template_format: format of the template.
**kwargs: keyword arguments to pass to the constructor.
Returns:
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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