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为什么我跑范例代码不报错?

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这是我复制的代码,我把它命名为mydict.py文件。代码中,我把__getattr__给注释掉了。

class Dict(dict):
    '''
    Simple dict but also support access as x.y style.

    >>> d1 = Dict()
    >>> d1['x'] = 100
    >>> d1.x
    100
    >>> d1.y = 200
    >>> d1['y']
    200
    >>> d2 = Dict(a=1, b=2, c='3')
    >>> d2.c
    '3'
    >>> d2['empty']
    Traceback (most recent call last):
        ...
    KeyError: 'empty'
    >>> d2.empty
    Traceback (most recent call last):
        ...
    AttributeError: 'Dict' object has no attribute 'empty'
    '''
    def __init__(self, **kw):
        super().__init__(**kw)

    
    #def __getattr__(self, key):
     #   try:
      #      return self[key]
       # except KeyError:
         #   raise AttributeError(r"'Dict' object has no attribute '%s'" % key)
    
    def __setattr__(self, key, value):
        self[key] = value

if __name__ == 'main':
    import doctest
    doctest.testmod()

在命令行里我输入了

 python mydict.py

但是没有出现任何错误,请问这是为什么?

bsjebd4846

#2 Created at ... [Delete] [Delete and Lock User]

倒数第三行main函数错了,应该是__main__


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