Check if value from one dataframe exists in another dataframe

Question

I have 2 dataframes.

Df1 = pd.DataFrame({\'name\': [\'Marc\', \'Jake\', \'Sam\', \'Brad\']
Df2 = pd.DataFrame({\'IDs\': [\'Jake\', \'John\', \'Marc\', \'Tony         


        

Answer 1

By using merge

s=Df1.merge(Df2,left_on='name',right_on='IDs',how='left')
s.IDs=s.IDs.notnull().astype(int)
s
Out[68]: 
   name  IDs
0  Marc    1
1  Jake    1
2   Sam    0
3  Brad    0