python中的一些查询模块、函数等使用方法的操作
-
help()
>>> help(abs) Help on built-in function abs in module builtins: abs(x, /) Return the absolute value of the argument. (END) -
dir() 列出所查询内容的内置属性和方法
>>> dir(abs) ['__call__', '__class__', '__delattr__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__gt__', '__hash__', '__init__', '__init_subclass__', '__le__', '__lt__', '__module__', '__name__', '__ne__', '__new__', '__qualname__', '__reduce__', '__reduce_ex__', '__repr__', '__self__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', '__text_signature__'] -
__doc__ 一般为创建该类时候的备注
>>> abs.__doc__ 'Return the absolute value of the argument.' -
__dict__ 查看对象所拥有的属性