python中两个列表相加 python中两个列表怎么相乘

list列表乘法：列表list*n = 列表list内所有元素添加n次

list列表加法：相当于append()函数

PyDev console: starting.
Python 3.8.3 (default, Jul  2 2020, 11:26:31) 

x = []
x.extend(["wo"]*3)

x
['wo', 'wo', 'wo']

# 乘法？yes!
["wo"]*3
['wo', 'wo', 'wo']

# 加法？yes!相当于append
["wo"]+["1"]
['wo', '1']

# 减法？失败hhh
["wo"]-["1"]
Traceback (most recent call last):
  File "<input>", line 1, in <module>
TypeError: unsupported operand type(s) for -: 'list' and 'list'
["wo","1"]-["1"]
Traceback (most recent call last):
  File "<input>", line 1, in <module>
TypeError: unsupported operand type(s) for -: 'list' and 'list'