I have dataset A and B
A['colA'] = [1,2,3,4,5]
B['colA']= [1,2,3]
I want to drop all A['colA']'s 4,5 because it does not exist in dataframe B
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4`A[A['colA'].isin(B['colA'])]`? – Quang Hoang Feb 20 '20 at 05:11
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how many columns do you have in each dataframe? – Sociopath Feb 20 '20 at 05:13