2013/2/26 Ian Kelly <ian.g.ke...@gmail.com>: > On Tue, Feb 26, 2013 at 9:27 AM, andrea crotti > <andrea.crott...@gmail.com> wrote: >> So I was trying to use groupby (which I used in the past), but I >> noticed a very strange thing if using list on >> the result: > > As stated in the docs: > > """ > The returned group is itself an iterator that shares the underlying > iterable with groupby(). Because the source is shared, when the > groupby() object is advanced, the previous group is no longer visible. > So, if that data is needed later, it should be stored as a list: > """ > -- > http://mail.python.org/mailman/listinfo/python-list
I should have read more carefully sorry, I was in the funny situation where it would have actually worked in the production code but it was failing in the unit tests (because I was using list only there). It's very weird though this sharing and still doesn't really look rightl, is it done just for performance reasons? -- http://mail.python.org/mailman/listinfo/python-list
