如何使用数据框的元素，如散列键/字典键/主键？

I have a dataframe in which I want to use certain values as hash keys / dictionary keys (or whatever you call it in your language of choice) for other values in that dataframe. Say I have a dataframe like this which I've read in from a large csv file (only first row shown): I have a dataframe in which I want to use certa