Answers for "delete columns with nan values panas"

drop column with nan values

fish_frame = fish_frame.dropna(axis = 1, how = 'all')

when converting from dataframe to list delete nan values

a = [[y for y in x if pd.notna(y)] for x in df.values.tolist()]
print (a)
[['str', 'aad', 'asd'], ['ddd'], ['xyz', 'abc'], ['btc', 'trz', 'abd']]