python test if value is np nan

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Matthew
27 Oct 2020
1import numpy as np
2
3mynan = np.nan
4mynum = 18
5
6print("NaN? : ", np.isnan(mynan)) # Use np.isnan() to test
7print("NaN? : ", np.isnan(mynum))
8
9# Results:
10# Nan? : True
11# NaN? : False
source
Lily
06 Oct 2020
1array_has_nan = np.isnan(array_sum)
Tom
05 Sep 2019
1math.isnan(n)
source
Ian
08 Aug 2018
1import math
2print math.isnan(float('NaN'))OutputTrue
3print math.isnan(1.0)OutputFalse
4
source
Isabella
18 Jun 2018
1import numpy as np
2import pandas as pd
3
4val = np.nan
5
6print(pd.isnull(val))
7# True
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