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【Python】重写父类方法

作者:人生如歌 / 发布于2015/7/17/ 538


	class MyList:
	 def __init__(self, start):
	 #self.wrapped = start[:]
	 self.wrapped = []
	 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):
	 return getattr(self.wrapped, name)
	 def __repr__(self):
	 return 'self.wrapped'

	class MyListSub(MyList):
	 calls = 0

	 def __init__(self, start):
	 self.adds = 0
	 MyList.__init__(self, start)

	 def __add__(self, other):
	 MyListSub.calls = MyListSub.calls + 1
	 self.adds = self.adds + 1
	 return MyList.__add__(self, other)

	 def stats(self):
	 return self.calls, self.adds

	if __name__ == '__main__':
	 x = MyListSub('A')
	 y = MyListSub('B')
	 print x[0]
	 print x[1:]
	 print x + ['C']
	 print x + ['D']
	 print y + ['E']
	 print x.stats()

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　重写　　父类方法　

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