I need to keep an updated dictionary of pictures in my application. I have a function which takes snapshots of the current pictures available. Some of the pictures in my dictionary have been deleted, so their dict entry needs to be removed. Here is a snippet of very ugly code I have which works. I'm looking for quick suggestions for a better implementation-- all nice replies welcomed!
Thanks,
Marcus
-- code snippet
# 1st, find the 'stale' items in our dictionary to delete
# lstKeepers is a list of current pictures
# Note: if I try to iterate over the keys of the dict and
# remove-as-I-go, I get an exception (dict size changed
# during iteration)
lstRemove = []
for key in myDict:
if key not in lstKeepers:
lstRemove.append(key)
# 2nd, remove them
for oldKey in lstRemove:
del myDict[oldKey]
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