I have a weird dictionary key issue: I have an 'Article' model, with
textfields for Year and Country and foreignkeys for Magazine and
Author.
I generate a frequency list for each criteria (e.g.: Year=2005) which
I use to keep the count. To do this, I subclassed dictionary like so:
class dictinc(dict):
"""dictionary with a 'set or increment' method"""
def inc(self,key):
self[key]=self.get(key,0)+1
so I create yeardict=dictinc() and if I want to add 1 to the count for
Year=2005, I use:
yeardict.inc(2005)
This works fine whenever I use text or integers as keys. However, if I
try to use a model instance (e.g.:a Magazine instance), it works fine
on my development (Vista) machine, but not on my production machine
(Linux, on webfaction).
Locally, if I have two articles that reference "magazine1", and call
for each one:
magazine = article.magazine
magazinedict.inc(magazine)
magazinedict becomes
{<Magazine: magazine1>: 2}
however, on the production server, magazinedict is:
{<Magazine: magazine1>: 1,
<Magazine: magazine1>: 1}
If I try to check whether the keys are equal:
a,b = magazinedict.keys()
a == b
True
So, I guess the problem is using a model instance as a dictionary key.
What's weird is the development/production server discrepancy.
Development is running 0.97, production 0.96, which I guess might
account for the difference, no?
Any ideas on how to fix this?
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