Python中zip()函数的简单用法举例

> a = [1,2,3]

> b = [4,5,6]

> c = [4,5,6,7,8]

> zipped = zip(a,b)

[(1, 4), (2, 5), (3, 6)]

> zip(a,c)

[(1, 4), (2, 5), (3, 6)]

> zip(*zipped)

[(1, 2, 3), (4, 5, 6)]

a = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

print [ [row[col] for row in a] for col in range(len(a[0]))]

[[1, 4, 7], [2, 5, 8], [3, 6, 9]]

> a = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

> zip(*a)

[(1, 4, 7), (2, 5, 8), (3, 6, 9)]

> map(list,zip(*a))

[[1, 4, 7], [2, 5, 8], [3, 6, 9]]

x=[1,2,3],y=['a','b','c']
>zip(x,y)
[(1,'a'),(2,'b'),(3,'c')]

x=[1,2],y=['a','b','c']
>zip(x,y)
[(1,'a'),(2,'b')]

x=[1,2,3],y=['a','b','c']
zip(*zip(x,y))
[(1,2,3),('a','b','c')]