I have a data frame like this:
index | ft | rt |
---|---|---|
0 | 1401/04/21 13:36:00 | 1401/04/21 13:09:16 |
1 | 1401/04/21 14:00:00 | 1401/04/21 13:00:00 |
these column dates are based on "the Solar Hijri calendar". and when I use
type()
for values in these columns, it shows me that they are as strings. how can I subtract these columns ?! (ft - rt) Any help would be greatly appreciated!