python check if nan

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Cayla
29 Mar 2019
1cleanedList = [x for x in countries if str(x) != 'nan']
2
Raphael
22 Nov 2018
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
Roberto
22 Sep 2020
1math.isnan(n)
source
Oskar
12 Jun 2020
1import math
2x = float('nan')
3math.isnan(x)
4True
source
Myfanwy
08 Sep 2016
1import math
2print math.isnan(float('NaN'))OutputTrue
3print math.isnan(1.0)OutputFalse
4
Noan
01 May 2020
1import numpy as np
2import pandas as pd
3
4val = np.nan
5
6print(pd.isnull(val))
7# True
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