memory leak in a Django app

gistfile1.py

# source of a massive memory leak in a Django app (if obj is QuerySet):
if not obj:
    return None

@aerosol: if this will do as context... ;)

This is an oddity I don't understand (I don't know why evaluated queryset wouldn't get GCed), but unfortunately I don't have time to examine it in laboratory conditions. All I can tell is that it was inside a helper function called from a view, which was passing paginator.object_list as obj.

For 99% leak was caused by applying not operator to a QuerySet instance:

# no leak
return None
if not obj:
    return None

# leak
if not obj:
    return None
return None