Your suggested solution is to use the set_axis function, but by my understanding that would actually change the index datatype of the dataframe in memory, whereas in my situation I want to keep the ...

I have a data frame (derived from a csv file) with about 100m entries that looks like this: df1: var1 var2 0 1 2 1 2 1 2 1 {3,4,5} 3 5 6 4 {4,5,6,7} 8i need to ...