/Python/How to check if a value is nan in python

How to check if a value is nan in python

Python test is nan

math.isnan(n)

Source: docs.python.org

Check if a value in dataframe is nan

#return a subset of the dataframe where the column name value == NaN 
df.loc[df['column name'].isnull() == True]

Python check if nan

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

Source: stackoverflow.com

Check if something is nan python

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

Source: kite.com

Check is string is nan python

>>> pd.isnull(None)
True

Source: stackoverflow.com

How to check if a value is nan in python

# If you are doing any conditional operation and you want to check a if
# a single value is Null or not then you can use numpy's isna method.
np.isna(df[col][0])

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