# Filtering a list based on a list of booleans

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I have a list of values which I need to filter given the values in a list of booleans:

``````list_a = [1, 2, 4, 6]
filter = [True, False, True, False]
``````

I generate a new filtered list with the following line:

``````filtered_list = [i for indx,i in enumerate(list_a) if filter[indx] == True]
``````

which results in:

``````print filtered_list
[1,4]
``````

The line works but looks (to me) a bit overkill and I was wondering if there was a simpler way to achieve the same.

1- Don"t name a list `filter` like I did because it is a built-in function.

2- Don"t compare things to `True` like I did with `if filter[idx]==True..` since it"s unnecessary. Just using `if filter[idx]` is enough.

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We hope this article has helped you to resolve the problem. Apart from Filtering a list based on a list of booleans, check other code Python module-related topics.

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Davies Ungerschaft

New York | 2023-03-29

Simply put and clear. Thank you for sharing. Filtering a list based on a list of booleans and other issues with code Python module was always my weak point 😁. I just hope that will not emerge anymore

Jan Gonzalez

Munchen | 2023-03-29

filter is always a bit confusing 😭 Filtering a list based on a list of booleans is not the only problem I encountered. I am just not quite sure it is the best method

Anna Porretti

New York | 2023-03-29

Simply put and clear. Thank you for sharing. Filtering a list based on a list of booleans and other issues with filter was always my weak point 😁. Will use it in my bachelor thesis

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