check if any value is null in pandas dataframe
df.isnull().values.any()check if any value is null in pandas dataframe
df.isnull().values.any()How many columns have null values present in them? in pandas
import pandas as pd
df = pd.DataFrame({'a':[1,2,np.nan], 'b':[np.nan,1,np.nan],'c':[np.nan,2,np.nan], 'd':[np.nan,np.nan,np.nan]})
print(pd.isnull(df).sum())python if column is null then
df['real_lastName'] = np.where(df['LastName'].isnull(), df['Middle'], df['LastName'] )
print (df)
FirstName Middle LastName real_lastName
0 Tom Ju NaN Ju
1 Kity NaN Rob RobCopyright © 2021 Codeinu
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