CODEWITHSUNDEEP
pythonlistobjectindexing
Dylan Kim
Dylan Kim

Reputation: 3

Can you use list.index for a list of objects?

If I have a list of objects made from classes, is there a way to get the index of a particular object in that list?

I've tried using list.index like this:

    obj_list = [object1(), object2()]
    object1_index = obj_list.index(object1())
    return object1_index

But this just returns a ValueError, saying that object1() is not in list, even though it is.

Upvotes: 0

Views: 610

Answers (1)

Samwise
Samwise

Reputation: 71454

object1 is a constructor; each time you say object1() you're constructing a new object of class object1. Hence the object1() in your index() call does not refer to the same object as the one in obj_list.

You could do something like:

next(i for i, x in enumerate(obj_list) if isinstance(x, object1))

to find the index of the first object in obj_list that is an instance of object1.

Upvotes: 1

Related Questions