Randomising 2 CSV files

I want to randomise two CSV files simultaneously using python as 1 to 1 functions ie.

File1.csv.                  File2.csv
1.                                A
2.                                B
3.                                C
4.                                D
5.                                E

Output will be

File1.csv.                 File2.csv
4.                               D
1.                               A
3.                               C
5.                               E
2.                               B