Answers for "t value in python is nan"

python test if value is np.nan

import numpy as np

mynan = np.nan
mynum = 18

print("NaN? : ", np.isnan(mynan)) # Use np.isnan() to test
print("NaN? : ", np.isnan(mynum))

# Results:
# Nan? : True
# NaN? : False

python3 is nan

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