Script (just modified to add the print statements from before):

http://kmdaily.pastebin.com/m7cefb266

My output:
annotation_db.itervalues = 247912
annotation_db.values = 247912
annotation_db.sliceDB.iteritems = 247912
annotation_db.sliceDB.items = 247912

So it's not that! When I comment out building the mapping.Mapping from
the iteration I'm doing, I get the correct counts using itervalues:

    # use itervalues...doesn't iterate through all events!
    n = 0
    x = 0
    for (n, event) in enumerate(events.itervalues()):
        if event.clusterid:
            x += 1
#             cluster = clusters[event.clusterid + 1]
#             es = M.get(cluster, [])
#             es.append(event)
#             M[cluster] = es

    print "With itervalues, number of events seen: = %s, x = %s" %
(n,x)
    M.close()

Output:

With itervalues, number of events seen: = 247911, x = 247910


On Jun 15, 5:29 pm, Christopher Lee <l...@chem.ucla.edu> wrote:
> Hi Kenny,
> if annotation_db.itervalues() and annotation_db.values() return  
> different iteration counts, I'd strongly expect  
> annotation_db.sliceDB.iteritems() and annotation_db.sliceDB.items() to  
> also return different iteration counts.  Could you check that,  
> please?  And please post the code that checks the counts immediately  
> after creating the AnnotationDB (i.e. no worldbase), so we can see  
> exactly how you're counting from the iterator.
>
> Thanks!
>
> Chris
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