lets say i have a dataframe like below
Destination ZIP Express Zone Ground Zone
0 96700 12 9
1 96701 10 9
2 96702 12 9
2 96703 12 9
2 96704 12 9
i want to change it to this
Destination ZIP Zone Label
0 96700 12 Express Zone
1 96700 9 Ground Zone
2 96701 10 Express Zone
2 96701 9 Ground Zone
2 96702 12 Express Zone
How can i do this?