Cannot remove an item from the list

Asked Jul 28 '20 at 08:17

Active Jul 28 '20 at 08:18

Viewed 30 times

I created a function to remove items from a list. The items to be removed are passed in as a list in the function argument.

Here is the code:

a = ['one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine', 'ten']

def drop_data(data):
for i in a:
    if i in data:
        a.remove(i)
return a

data_r = ['one', 'two', 'three']

drop_data(data_r)

output:

['two', 'four', 'five', 'six', 'seven', 'eight', 'nine', 'ten']

Why can't i remove 'two' from the list?

edited Jul 28 '20 at 08:18

ilias-sp

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asked Jul 28 '20 at 08:17

saad arbani

1

You shouldn't remove items from a list you are iterating through. – quamrana Jul 28 '20 at 08:18
You iterate past it, when you remove `one` then `two` becomes `a[0]`, and now your loop is looking at `a[1]` which then is `three` so that's removed second. – ZWang Jul 28 '20 at 08:19
you also need to indent the code within your function – rab1262 Jul 28 '20 at 08:33

Cannot remove an item from the list

0 Answers0