python中获取函数签名(参数)

说明

有些时候我们不清楚python的函数的具体签名的时候，调用可能会报错，这里就是介绍一种简单的方法来获取函数的签名参数。

语法

获取函数的参数签名可以使用

组件.函数.__signature__

示例：

我想要获取streamlit.text_input函数的参数签名

$ python                                                                                                     
Python 3.10.12 (main, Jun 11 2023, 05:26:28) [GCC 11.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import streamlit
>>> print(streamlit.text_input.__signature__)
(self, label: 'str', value: 'str | SupportsStr | None' = '', max_chars: 'int | None' = None, key: 'Key | None' = None, type: "Literal['default', 'password']" = 'default', help: 'str | None' = None, autocomplete: 'str | None' = None, on_change: 'WidgetCallback | None' = None, args: 'WidgetArgs | None' = None, kwargs: 'WidgetKwargs | None' = None, *, placeholder: 'str | None' = None, disabled: 'bool' = False, label_visibility: 'LabelVisibility' = 'visible') -> 'str | None'
>>> 
>>> exit()