Issue 13318: Shelve second tier array subscript "[ ]" key creation doesn't work (original) (raw)

Issue13318

Created on 2011-11-01 22:54 by cpiekarski, last changed 2022-04-11 14:57 by admin. This issue is now closed.

Messages (2)
msg146816 - (view)	Author: Chris Piekarski (cpiekarski)	Date: 2011-11-01 22:54
Shelve object second tier array subscript key generation doesn't behave the same way dictionary object do. >>> import shelve >>> x = shelve.open("tst1.shelve") >>> x["one"] = {} >>> x {'one': {}} >>> x["one"]["two"] = 2 >>> x {'one': {}} Whereas with a dictionary it works: >>> y = {} >>> y["one"] = {} >>> y["one"]["two"] = 2 >>> y {'one': {'two': 2}}
msg146817 - (view)	Author: Ned Deily (ned.deily) *	Date: 2011-11-01 23:23
shelve is behaving as documented. Because the shelve dictionary entry is mutable (a dictionary), you need to set writeback=True to get the behavior you expect. http://docs.python.org/library/shelve.html