How to remove brackets and content from a list in Python

Question

So I have a list from which i want to remove something like a sub list. I don't know how to call it exactly so i couldn't find any results searching for an answer.

list = [[0, 1, 0, 0], [0, 1, 1, 1], [1, 1, 0, 0], [0, 0, 0, 0]]

I just want to remove one of those 4 brackets, for example the first one. Should i use "remove" or "delete" or how do i do that?

list = [[0, 1, 1, 1], [1, 1, 0, 0], [0, 0, 0, 0]]

Relevant: https://stackoverflow.com/questions/11520492/difference-between-del-remove-and-pop-on-lists/11520540#11520540 — Patrick Haugh, May 09 '19 at 19:07

score 0 · Answer 1 · answered May 09 '19 at 19:07

0

If you know the index which you want to remove i:

del l[i]
# Or l.pop(i)

If you know the value you want to remove val:

l.remove(val)

P.S: Don't use list as the name of a variable. It's a name of a builtin class

answered May 09 '19 at 19:07

rdas

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Thank you very much! Sorry i can't give upvotes because i dont have enough rep. – user8385652 May 09 '19 at 19:11
Please note that remove(value) removes the first occurance of value the method encounters. So if the list contains 'xyz' three times, only the first 'xyz' gets removed. – TimB May 09 '19 at 19:17

score 0 · Accepted Answer · answered May 09 '19 at 19:08

0

You can del it by its index. For example to delete the first one, you can do:

my_list = [[0, 1, 0, 0], [0, 1, 1, 1], [1, 1, 0, 0], [0, 0, 0, 0]]
del my_list[0]
print(my_list)

# output:
[[0, 1, 1, 1], [1, 1, 0, 0], [0, 0, 0, 0]]

answered May 09 '19 at 19:08

Amir

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Thank you! Would give you an upvote if i had 15 rep. – user8385652 May 09 '19 at 19:10
You're welcome. If this answers your question, you can check it as the correct answer, so other people can rely on it – Amir May 09 '19 at 19:11

How to remove brackets and content from a list in Python

2 Answers2