Answers for "pandas update even rows with nan"

count rows with nan pandas

np.count_nonzero(df.isnull().values)   
 np.count_nonzero(df.isnull())           # also works

Posted by: Guest on January-14-2021

pandas where retuning NaN

# Try using a loc instead of a where:
df_sub = df.loc[df.yourcolumn == 'yourvalue']

Posted by: Guest on April-08-2021

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