Check if item is in list of list

Question

I'm looking to see if item is in list of list.

List1 = [['a','b','c'],['d','e','f'],['g','h','i']]

If b is in any of the list in a list, then print True. Else, print False.

What's the pythonic way to do this?

Jay · Answer 1 · 2020-08-04T18:21:26.893

9

Try this:

# check element exists in list of list or not? 
result = any("b" in sublist for sublist in List1) 

# printing result 
print(str(result))

edited Aug 04 '20 at 18:21

answered Aug 04 '20 at 18:15

Jay

Um... what's the point of `str(...)` here? – superb rain Aug 04 '20 at 21:51
@superbrain Oh, I dunno. There’s at least as much a point as your nit-picking something really minor that really isn’t part of the answer but secondary to it. – JL Peyret Aug 05 '20 at 15:23
@JLPeyret I don't see how none is at least as much as some. – superb rain Aug 05 '20 at 15:31
Whatever. And I find your answer harder to grok too but I suppose you just had to make it look better by nit picking someone else’s. – JL Peyret Aug 05 '20 at 15:34

score 0 · Answer 2 · answered Aug 04 '20 at 21:55

0

I'll play the fool...

>>> 'b' in sum(List1, [])
True
>>> 'B' in sum(List1, [])
False

answered Aug 04 '20 at 21:55

superb rain

2 Answers2