if i == nan python code example

Example 1: python3 is nan

>>> import math
>>> x = float('nan')
>>> math.isnan(x)
True

Example 2: check if something is nan python

import math
print math.isnan(float('NaN'))OutputTrue
print math.isnan(1.0)OutputFalse

Example 3: python checking if something is equal to NaN

# Test to see if it is equal to itself
def isNaN(num):
    return num != num