Some combination of the above: GroupBy will examine the results of the apply step and try to return a sensibly combined result if it doesn’t fit into either of the above two categories. Since the set of object instance methods on pandas data structures are generally rich and expressive, we...
I know it is not a problem per se but I think there should be some pandas built in solution for this problem, as no simple function exists for this. It is largely discussed here with various ideas (https://stackoverflow.com/questions/12680754/split-pandas-dataframe-string-entry-to-separate...