Indeed that is the issue. If I just remove the line that adds to the Mapping (M[cluster] = es), then the loop finishes correctly. Thank you so much for your help...hope I didn't cause any heart attacks for such a trivial thing!
Kenny On Jun 16, 10:16 am, Christopher Lee <l...@chem.ucla.edu> wrote: > Hi Kenny, > OK, I see the problem. Your Mapping is given the AnnotationDB events > as its target. You are looping over events.itervalues(), and in the > middle of that loop you are adding to the Mapping. events.sliceDB is a > SQLTable, I believe. Iteration over that SQLTable uses a cursor. Any > operation that interacts with that SQLTable uses the same cursor, and > will thus interfere with continuing the iteration of the SQLTable. > > This is analogous to deleting objects from a dictionary d within an > iterator loop (for v in d.itervalues():); the results are undefined > because the statements inside the loop interfere with the iterator > that is feeding the loop. You can't use an iterator in this case; you > have to capture all of the values in a list before beginning to run > the statements inside the loop. I.e. you can't use itervalues(); you > have to use values(). > > -- Chris --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "pygr-dev" group. To post to this group, send email to pygr-dev@googlegroups.com To unsubscribe from this group, send email to pygr-dev+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/pygr-dev?hl=en -~----------~----~----~----~------~----~------~--~---
