[issue9523] Improve dbm module

Terry J. Reedy added the comment: Upgrading to match the MutableMapping interface seems reasonable. -- nosy: +terry.reedy stage: -> patch review ___ Python tracker ___ _

[issue9523] Improve dbm module

Changes by Ray.Allen : -- components: +Extension Modules type: -> feature request versions: +Python 3.2 ___ Python tracker ___ ___ Pyt

[issue9523] Improve dbm module

New submission from Ray.Allen : During the patching work of issue8634, I found several problems about the module dbm.gnu and dbm.ndbm, I feel it's better to address them on a separate issue. 1. As issue8634 said, the dbm.gnu, dbm.ndbm and dbm.dumb should have the similar interface, since they