Re: groupby - summing multiple columns in a list of lists

2011-05-17 Thread Peter Otten
Jackson wrote: > I'm currently using a function pasted in below. This allows me to sum > a column (index) in a list of lists. > > So if mylist = [[1, 2, 3], [1, 3, 4], [2, 3, 4], [2, 4, 5]] > group_results(mylist,[0],1) > > Returns: > [(1, 5), (2, 7)] > > What I would like to do is allow a tupl

groupby - summing multiple columns in a list of lists

2011-05-17 Thread Jackson
I'm currently using a function pasted in below. This allows me to sum a column (index) in a list of lists. So if mylist = [[1, 2, 3], [1, 3, 4], [2, 3, 4], [2, 4, 5]] group_results(mylist,[0],1) Returns: [(1, 5), (2, 7)] What I would like to do is allow a tuple/list of index values, rather than