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python自定义list

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class MyList:
    def __init__(self, start):
        #self.wrapped = start[:]                 # Copy start: no side effects
        self.wrapped = []                        # Make sure it's a list here.
        for x in start: self.wrapped.append(x)
    def __add__(self, other):
        return MyList(self.wrapped + other)
    def __mul__(self, time):
        return MyList(self.wrapped * time)
    def __getitem__(self, offset):
        return self.wrapped[offset]
    def __len__(self):
        return len(self.wrapped)
    def __getslice__(self, low, high):
        return MyList(self.wrapped[low:high])
    def append(self, node):
        self.wrapped.append(node)
    def __getattr__(self, name):                 # Other members: sort/reverse/etc
        return getattr(self.wrapped, name)
    def __repr__(self):
        return self.wrapped

if __name__ == '__main__':
    x = MyList('spam')
    print x
    print x[0]
    print x[1:]
    print x + ['eggs']
    print x * 3
    x.append('a')
    x.sort( )
    for c in x: print c,

标签:Python,Class

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