>>> range(10) [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] >>> type(range(10)) <type 'list'> >>> xrange(10) xrange(10) >>> type(range(10)) <type 'list'> >>> type(xrange(10)) <type 'xrange'> >>> dir(xrange) ['__class__', '__delattr__', '__doc__', '__format__', '__getattribute__', '__getitem__', '__hash__', '__init__', '__iter__', '__len__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__reversed__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__'] -----------------------分割线---------------------------- py2中range生成的是列表,应该用xrange py3没有xrange