Why is True + 2 , 3 or False + 2, 2

Question

>>> True + 2
    3
>>> False + 2
    2

I can understand that somehow, True means 1 and False means 0 . So does it mean, a Boolean and integer operation always gives an integer?

Yes. Adding a boolean to an int produces an int, because in Python `True==1` and `False==0`. — khelwood, Oct 28 '16 at 09:07

score 3 · Accepted Answer · answered Oct 28 '16 at 09:10

In python bool is a subclass of int, and therefor satisfies the "is-a" relation, meaning a bool is-a int.

To demonstrate:

issubclass(bool, int)
=> True
isinstance(True, int)
=> True

In practice this means that in any operation which works on an int, the int can be substituted with a bool.

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