Python zip list of tuples

Question

How can I zip a list of tuples in Python?

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

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

assuming you want to retain elements as tuple, try `list(zip(*tuples))` — rv.kvetch, Oct 20 '21 at 17:29
reason why I am a bit confused, because in the desired transformation, `tuples` is a misleading name, as you end up with a list of lists above. — rv.kvetch, Oct 20 '21 at 17:30

score 2 · Accepted Answer · answered Oct 20 '21 at 17:28

Just use zip and list comprehension.

>>> tuples = [(1, 2, 3), (4, 5, 6), (7, 8, 9)]
>>> [list(i) for i in zip(*tuples)]
[[1, 4, 7], [2, 5, 8], [3, 6, 9]]

Or,

>>> tuples = [(1, 2, 3), (4, 5, 6), (7, 8, 9)]
>>> [[*i] for i in zip(*tuples)]
[[1, 4, 7], [2, 5, 8], [3, 6, 9]]

score 1 · Answer 2 · answered Oct 20 '21 at 17:42

1

If you are okay with using numpy then

import numpy as np
l=[(1, 2, 3), (4, 5, 6), (7, 8, 9)]
[tuple(i) for i in (np.array(l).transpose())]

answered Oct 20 '21 at 17:42

mad_

2 Answers2