filter python list based on values in a different list

Question

I think this is an entry level computer science 101 course question about algorithms and data structures.

I have a list:

VAV_ID_list = ['36','38','21','29','31','25','9','13','14','19','30','8','26','6','34','11','12028','20','27','15','12032','23','16','24','37','39','12033','10']

How I can I filter out these values in VAV_ID_exclude_list from VAV_ID_list?

VAV_ID_exclude_list = ['36','38','21','29','31','25','9','13','14','19','30','8','26','6']

This code below obviously doesnt do anything any tips greatly appreciated.

filtered_VAV_ID_list = [zone for zone in VAV_ID_list if zone == 36]

print(filtered_VAV_ID_list)

list2= [zone for zone in VAV_ID_list if zone not in VAV_ID_exclude_list] — user15801675
– user15801675, Commented Jun 22, 2021 at 15:36
Can you post your answer @Sujay? This works ill hit the green check box — bbartling
– bbartling, Commented Jun 22, 2021 at 15:37
Does this answer your question? how to keep elements of a list based on another list — pho
– pho, Commented Jun 22, 2021 at 15:40
An "entry level computer science 101 course question" probably already has answers on Stack Overflow. How much research effort is expected of Stack Overflow users? — pho
– pho, Commented Jun 22, 2021 at 15:41

user15801675 · Accepted Answer · 2021-06-22 15:38:50Z

2

This is what you want

list2= [zone for zone in VAV_ID_list if zone not in VAV_ID_exclude_list]

answered Jun 22, 2021 at 15:38

user15801675

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Ahasanul Haque · Accepted Answer · 2021-06-22 15:41:01Z

2

You can do it in multiple ways:

This is the most straightforward way.

>>> [i for i in VAV_ID_list if i not in VAV_ID_exclude_list]
['34', '11', '12028', '20', '27', '15', '12032', '23', '16', '24', '37', '39', '12033', '10']

You can even use sets if the order is not important and you don't have duplicates.

>>> list(set(VAV_ID_list) - set(VAV_ID_exclude_list))
['24', '11', '39', '27', '20', '23', '12033', '12032', '16', '37', '34', '15', '12028', '10']

edited Jun 22, 2021 at 15:41

answered Jun 22, 2021 at 15:36

Ahasanul Haque

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1 Comment

bbartling Over a year ago

Thanks for the info ill hit the 1 up arrow, but @Sujay answer first

Zoe Lubanza · Accepted Answer · 2021-06-22 15:45:10Z

0

for el in VAV_ID_list:
    if el not in VAV_ID_exclude_list:
        print(el)

I think this will do it.

answered Jun 22, 2021 at 15:45

Zoe Lubanza

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