show rows with a null value pandas
df1 = df[df.isna().any(axis=1)]
show rows with a null value pandas
df1 = df[df.isna().any(axis=1)]
find null values pandas
#Retreieve boolean values of whether or not the given cells of a dataframe are
#null
df.isnull()
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 Rob
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