import itertools

df_gold_users = badges[(badges['Class'] == '1')]
df=pd.merge(df_gold_users,comments,on='UserId')
gold_text=list(itertools.chain.from_iterable(df['Text'].to_list()))
gold_text=list(map(lambda x:[x,1],gold_text))
gold_text_df=pd.DataFrame(gold_text,columns=['Text','xyz'])
gold_text_df=gold_text_df.groupby('Text')['xyz'].count().reset_index().sort_values(by=['xyz'], ascending=False)
gold_text_df(10).values.tolist()