利用Python 手写一个迭代器

Python

# coding:utf-8 __author__ = 'songhao' class Data(object): def __init__(self): self._data = [] def add(self,a): self._data.append(a) def data(self): return iter(self._data) if __name__ == '__main__': d = Data() d.add(1) d.add(2) d.add(3) for i in d.data(): print(i) """ 运算结果 /usr/local/bin/python3 /Users/songhao/Desktop/Old_Boy_Python/04/data.py 1 2 3 """

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# coding:utf-8 __author__ = 'songhao'     class Data ( object ) :      def __init__ ( self ) :          self . _data = [ ]        def add ( self , a ) :          self . _data . append ( a )        def data ( self ) :          return iter ( self . _data )     if __name__ == '__main__' :      d = Data ( )      d . add ( 1 )      d . add ( 2 )      d . add ( 3 )      for i in d . data ( ) :          print ( i )   """ 运算结果 /usr/local/bin/python3 /Users/songhao/Desktop/Old_Boy_Python/04/data.py 1 2 3 """

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