How big is an int in python code example

Example 1: is int python

isinstance(n, int) # n = 9, Returns True / n = 5.5, Returns False

Example 2: python is integer

(1.23).is_integer() # Returns false

Example 3: max int in a python list

>>> L=[2,-7,3,3,6,2,5]
>>> max(L)
6