How do I check if two variables reference the same object in Python?

Question

x and y are two variables. I can check if they're equal using x == y. But how can I check if they have the same identity?

Example:

x = [1, 2, 3]
y = [1, 2, 3]

Now x == y is True because x and y are equal. However, x and y aren't the same object. I'm looking for something like sameObject(x,y) which in that case is supposed to be False.

Answer 1

You can use is to check if two objects have the same identity.

>>> x = [1, 2, 3]
>>> y = [1, 2, 3]
>>> x == y
True
>>> x is y
False