Check if multi dimensional list element exists in another list

Question

Consider these two lists:

ListA = ["High", [1,2,3], "Medium"] ListB = [["Low", [3,2,1], "Low"], ["High", [1,2,3], "Medium"]]

Now I want to check if ListA exists in ListB. In this example, it should give TRUE since ListA equals ListB[1].

Normally I would convert the list to a set so all duplicates get removed, however, since this is not a flat list I'm stuck finding a good way to solve this.

weird, i tried that already before posting but it still says true even if it doesn't exist in the second list.. — Azrion, Jan 16 '22 at 13:17
Does this answer your question? [Fastest way to check if a value exists in a list](https://stackoverflow.com/questions/7571635/fastest-way-to-check-if-a-value-exists-in-a-list) — Hector Haffenden, Jan 16 '22 at 13:18
You may have a bug in your code, this `in` works fine for me. — Hector Haffenden, Jan 16 '22 at 13:18

score 1 · Accepted Answer · answered Jan 16 '22 at 13:13

1

if ListA in ListB:
    print('ListA exists in ListB.')

answered Jan 16 '22 at 13:13

this doesnt work – Azrion Jan 16 '22 at 13:15
@Azrion why it does not work? Can you put an example? – arshovon Jan 16 '22 at 13:17
@Azrion, I checked it in the Python interpreter before posting. Why do you say it doesn't work? Can you share your code? – Jan 16 '22 at 13:22
ok i figured it out its my dumb mistake with a bug... i change ListA[0] to some random value and then checked if it exists in ListA. obviously it returns true because I didn't run a deepcopy... – Azrion Jan 16 '22 at 13:26

Check if multi dimensional list element exists in another list

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