python reverse()方法
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'
