what is the use of isinstance in python code example

Example 1: isinstance python

isinstance(object, classinfo)

# if classinfo is a tuple of type objects (or recursively, other such tuples), return True
# if object is an instance of any of the types. If classinfo is not a type or tuple of types
# and such tuples, a TypeError exception is raised.

Example 2: isinstance in python

x == 1
isinstance(x<3)
  #will automatically return true or false