Check if pandas column contains all elements from a list

Question

I have a df like this:

frame = pd.DataFrame({\'a\' : [\'a,b,c\', \'a,c,f\', \'b,d,f\',\'a,z,c\']})

And a list of items:

let         


        

Answer 1

I would build a list of Series, and then apply a vectorized np.all:

contains = [frame['a'].str.contains(i) for i in letters]
resul = frame[np.all(contains, axis=0)]

It gives as expected:

       a
0  a,b,c
1  a,c,f
3  a,z,c