how to remove nan values from dictionary dataframe in python code example

Example 1: python how to delete from dictionary a nan key

d = {k: v for k, v in d.items() if k == k}

Example 2: 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']]