value is nan python code example

Example 1: python test is nan

math.isnan(n)

Example 2: python3 is nan

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

Example 3: check if something is nan python

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