DataFrame Finden NAN -Zeilen
df[df.isnull().any(axis=1)]
Selfish Swiftlet
df[df.isnull().any(axis=1)]
#return a subset of the dataframe where the column name value == NaN
df.loc[df['column name'].isnull() == True]
# to mark NaN column as True
df['your column name'].isnull()