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

IIUC, explode and a boolean filter

the idea is to create a single series then we can groupby the index the count the true occurrences of your list using a cumulative sum

s = frame['a'].str.split(',').explode().isin(letters).groupby(level=0).cumsum()

print(s)

0    1.0
0    1.0
0    2.0
1    1.0
1    2.0
1    2.0
2    0.0
2    0.0
2    0.0
3    1.0
3    1.0
3    2.0

---

frame.loc[s[s.ge(2)].index.unique()]

out:

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