代码语言:javascript复制
Python中 reverse()是列表的内置方法,无参数,无返回值,reverse()会改变列表(原地反转),因此无需返回值。字典、元组、字符串不具有reverse()方法,如果调用将会返回一个异常.
>>> help(list.reverse)
Help on method_descriptor:
reverse(...)
L.reverse() -- reverse *IN PLACE*
>>> l=[1,2,3,4,5]
>>> l.reverse()
>>> l
[5, 4, 3, 2, 1]
>>> t=(2,3,4,5,6)
>>> t.reverse()#报错
AttributeError: 'tuple' object has no attribute 'reverse'
>>> s='python'
>>> s.reverse()#报错
AttributeError: 'str' object has no attribute 'reverse'
>>> d={'a':1,'b':2}
>>> d.reverse()#报错
AttributeError: 'dict' object has no attribute 'reverse'