python test is nan
math.isnan(n)python test is nan
math.isnan(n)numpy is not nan
a = a[~np.isnan(a)]check if something is nan python
import math
print math.isnan(float('NaN'))OutputTrue
print math.isnan(1.0)OutputFalseisnotin python
import pandas as pd
>>> df
country
0 US
1 UK
2 Germany
3 China
>>> countries_to_keep
['UK', 'China']
>>> df.country.isin(countries_to_keep)
0 False
1 True
2 False
3 True
Name: country, dtype: bool
>>> df[df.country.isin(countries_to_keep)]
country
1 UK
3 China
>>> df[~df.country.isin(countries_to_keep)]
country
0 US
2 GermanyisNaN
function milliseconds(x) {
if (isNaN(x)) {
return 'Not a Number!';
}
return x * 1000;
}
console.log(milliseconds('100F'));
// expected output: "Not a Number!"
console.log(milliseconds('0.0314E+2'));
// expected output: 3140python max()
i = max(2, 4, 6, 3)
print(i)
# Result will be 6 because it is the highest numberCopyright © 2021 Codeinu
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