Python "member of" function

[brianlum]

Hi,

I was wondering if anyone knew of a built in Python function that will
check if an item is a member of a list, i.e., if item i is a member of
list l.

I read of a function "in" but I can't seem to get that to work and
finding pages for "python in" does not reveal very many relevant
sources.

Thanks!

 

[Erik Max Francis]

I was wondering if anyone knew of a built in Python function that will
check if an item is a member of a list, i.e., if item i is a member of
list l.

I read of a function "in" but I can't seem to get that to work and
finding pages for "python in" does not reveal very many relevant
sources.

Yes, `in` is the relevant operator. It's quite simple to use:

>>> a = [1, 4, 9, 16, 25]
>>> 2 in a False
>>> 4 in a

True

If you're having problems using it in some circumstance, you'll have to
be specific.

 

[Rene Pijlman]

(e-mail address removed):

I was wondering if anyone knew of a built in Python function that will
check if an item is a member of a list, i.e., if item i is a member of
list l.

1 in [1,3,4] True
2 in [1,3,4]

False

 

[brianlum]

Thanks, I was using "in" incorrectly. Thanks a lot!