Convert cells in dataframe with multiple values to multiple rows

Question

My data is like this:

Name    test1     test2      Count
Emp1    X,Y        A           1
Emp2    X          A,B,C       2
Emp3    Z          C           3
<         


        

Answer 1

Comprehension

pd.DataFrame(
    [(n, a, b, c)
     for n, A, B, c in zip(*map(df.get, df))
     for a in A.split(',') for b in B.split(',')],
    columns=df.columns
)

   Name test1 test2  Count
0  Emp1     X     A      1
1  Emp1     Y     A      1
2  Emp2     X     A      2
3  Emp2     X     B      2
4  Emp2     X     C      2
5  Emp3     Z     C      3