What does dir mean in python?-Python Tutorial-php.cn

What does dir mean in python?

藏色散人

Release： 2019-06-24 13:49:10

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What does dir mean in python?

When the dir() function in python takes no parameters, it returns the current List of variables, methods and defined types within the scope; when parameters are taken, a list of properties and methods of the parameters is returned. If the argument contains the method __dir__(), this method will be called. If the parameter does not contain __dir__(), this method will collect parameter information to the maximum extent possible.

dir Syntax:

dir([object])

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Parameter description:

object -- object, variable, type.

Return value

Returns the attribute list of the module.

The following example shows how to use dir:

>>>dir()   #  获得当前模块的属性列表
[&#39;__builtins__&#39;, &#39;__doc__&#39;, &#39;__name__&#39;, &#39;__package__&#39;, &#39;arr&#39;, &#39;myslice&#39;]
>>> dir([ ])    # 查看列表的方法
[&#39;__add__&#39;, &#39;__class__&#39;, &#39;__contains__&#39;, &#39;__delattr__&#39;, &#39;__delitem__&#39;, &#39;__delslice__&#39;, &#39;__doc__&#39;, &#39;__eq__&#39;, &#39;__format__&#39;, &#39;__ge__&#39;, &#39;__getattribute__&#39;, &#39;__getitem__&#39;, &#39;__getslice__&#39;, &#39;__gt__&#39;, &#39;__hash__&#39;, &#39;__iadd__&#39;, &#39;__imul__&#39;, &#39;__init__&#39;, &#39;__iter__&#39;, &#39;__le__&#39;, &#39;__len__&#39;, &#39;__lt__&#39;, &#39;__mul__&#39;, &#39;__ne__&#39;, &#39;__new__&#39;, &#39;__reduce__&#39;, &#39;__reduce_ex__&#39;, &#39;__repr__&#39;, &#39;__reversed__&#39;, &#39;__rmul__&#39;, &#39;__setattr__&#39;, &#39;__setitem__&#39;, &#39;__setslice__&#39;, &#39;__sizeof__&#39;, &#39;__str__&#39;, &#39;__subclasshook__&#39;, &#39;append&#39;, &#39;count&#39;, &#39;extend&#39;, &#39;index&#39;, &#39;insert&#39;, &#39;pop&#39;, &#39;remove&#39;, &#39;reverse&#39;, &#39;sort&#39;]
>>>

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