python3 zip函数的用法

python3 zip函数的用法

>>> x1=['0', '1', '3', '4', '5']
>>> *x1
SyntaxError: can't use starred expression here
>>> print(*x1)
0 1 3 4 5
>>> zip(*x1)
<zip object at 0x000000000B816EC8>
>>> q=zip(*x1)
>>> list(q)
[('0', '1', '3', '4', '5')]


>>>a = [1,2,3]
>>> b = [4,5,6]
>>> c = [4,5,6,7,8]
>>> zipped = zip(a,b)     # 返回一个对象
>>> zipped
<zip object at 0x103abc288>
>>> list(zipped)  # list() 转换为列表
[(1, 4), (2, 5), (3, 6)]
>>> list(zip(a,c))              # 元素个数与最短的列表一致
[(1, 4), (2, 5), (3, 6)]
 
>>> a1, a2 = zip(*zip(a,b))          # 与 zip 相反，zip(*) 可理解为解压，返回二维矩阵式
>>> list(a1)
[1, 2, 3]
>>> list(a2)
[4, 5, 6]
>>>