Make objects support "in"

Question

I have type of object called "GenomicLocation". I want to support the operation "in" for that object, so that I can write

genomic_location1 in genomic_location2

if certain conditions are met.

Is this possible? If so, how do I do it?

This might have been answered, but "in" was too short a keyword to allow for good google searches. — The Unfun Cat, Aug 26 '14 at 11:17
Possible duplicate of https://stackoverflow.com/questions/2217001/override-in-operator-in-python — semptic, Aug 26 '14 at 11:18

score 4 · Accepted Answer · answered Aug 26 '14 at 11:17

4

You should define the method

__contains__

Example:

>>> class Thing(object):
...     def __contains__(self, x):
...         return x == 'potato'
...     
>>> t = Thing()
>>> 'potato' in t
True
>>> 'spam' in t
False

answered Aug 26 '14 at 11:17

wim

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Make objects support "in"

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