How to convert a tuple of tuples to a list of lists?

Question

I would like to convert the tuple of tuples into a list of lists.

I don't want to flatten it, unlike these questions, and I don't want to make it a numpy array like in this question.

My only idea so far is to iterate the tuples with for loops and copy the values, but there must be something cleaner and more pythonic.

You can try simply map(list, a) – Hrvoje Jul 07 '15 at 10:07 — Hrvoje, Jul 07 '15 at 10:07

score 18 · Accepted Answer · answered Jul 07 '15 at 09:46

18

Is this what you want? -

In [17]: a = ((1,2,3),(4,5,6),(7,8,9))

In [18]: b = [list(x) for x in a]

In [19]: b
Out[19]: [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

This is called list comprehension, and when you do list(x) where x is an iterable (which also includes tuples) it converts it into a list of same elements.

answered Jul 07 '15 at 09:46

Anand S Kumar

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This works on python interpreter, but not in the script ...wierd. I get the error in the script as: TypeError: list() takes no arguments (1 given) – user956424 Mar 11 '16 at 05:11
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Are you sure in your script, you do not have a function like - `def list():` ? – Anand S Kumar Mar 11 '16 at 07:08
Anand S Kumar you just solved my problem! Thx a lot!... I had another list method in my flask views.py – user956424 Mar 11 '16 at 07:11

How to convert a tuple of tuples to a list of lists?

1 Answers1