Is there a way to check if an item exists in a Python tuple?

Question

I have seen an index function but it says it errors out if it can't find it. Is there a simple way to just check if the item exists? I just want to get a boolean value of the result so like:

if tuple.exists("item"):
    print "it exists"

Rohit Jain · Accepted Answer · 2013-02-15T20:47:20.497

34

Use in operator:

>>> 2 in (2, 3, 4)
True

in operator can be used to check for the membership of any element in a sequence.

And don't name your tuple as tuple. Use a different name.

edited Feb 15 '13 at 20:47

answered Feb 15 '13 at 20:42

Rohit Jain

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I don't, that was just an example to show that I am invoking the function on a tuple. – Joan Venge Feb 15 '13 at 20:43
@JoanVenge. Ok. I thought you were naming it that way. Then it's fine. – Rohit Jain Feb 15 '13 at 20:44
2

Also how would you do the negative `2 not in tuple`? – Joan Venge Feb 15 '13 at 20:44
1

@JoanVenge to do the negation you use the `not` keyword as the logical operator. You can do something like this... `2 not in (1, 3)` which evaluates as `True`. Conversely `2 not in (1, 2, 3)` evaluates as `False`. – UrbanConor Dec 07 '21 at 10:15

Is there a way to check if an item exists in a Python tuple?

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