打印嵌套列表，python

Question

I have a nested list like this:

nestedList = [[1,2,3],[4,5,6]]

I want to use a for-loop and print the two lists like this:

1   4
2   5
3   6

Any suggestions?

Answer 1

Use *nestedList to unpack argument lists values and then zip to iterate over them:

nestedList = [[1,2,3],[4,5,6]]

for a in zip(*nestedList):
    print(a)

Output:

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

Answer 2

You can use zip() in for loop and output should be like this :

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

or using simple code like this :

nestedList = [[1,2,3],[4,5,6]]

l1 = nestedList[0]
l2 = nestedList[1]

for i in range(3):
    print(l1[i],' ',l2[i])

output should be like this :

1   4
2   5
3   6

Answer 3

You can simply use nested for loops to print as expected:

nestedlist = [[1,2,3],[4,5,6]]
for i in range(len(nestedlist)-1):
    for j in range(len(nestedlist[i])):
        print(nl[i][j]," ",nl[i+1][j])

Output:

1   4
2   5
3   6

Answer 4

Use a simple for loop and " ".join() mapping each int in the nested list to a str with map().

Example:

>>> ys = [[1, 2, 3], [4, 5, 6], [7, 8, 9, 10]]
>>> for xs in ys:
...     print(" ".join(map(str, xs)))
... 
1 2 3
4 5 6
7 8 9 10