既然+=类似于append()方法,那是不是用法也一样呢?..., 'b', 1, 2, 1, 2, 1, 2]
>>> x += range(3)
>>> x
['a', 'b', 1, 2, 1, 2, 1, 2, 0, 1, 2]
>>> x += map(str...range对象里的元素连接到一起。...那么运算符+是不是也支持类似的用法呢?...: can only concatenate list (not "str") to list
>>> x = x + {1, 2, 3}
Traceback (most recent call last