$ python3
Python 3.13.0a3+ (heads/main-dirty:841eacd076, Jan 26 2024, 00:39:26) [Clang 15.0.0 (clang-1500.1.0.2.5)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import dbm
>>> import dbm.gnu
>>> import dbm.ndbm
>>> import dbm.dumb
>>> dbm.gnu.open("gnu.db", "c").close()
>>> dbm.ndbm.open("ndbm.db", "c").close()
>>> dbm.dumb.open("dumb.db", "c").close()
$ python3 -m dbm gnu.db ndbm.db dumb.db other.db
python3: No module named dbm.__main__; 'dbm' is a package and cannot be directly execute
$ python3 -m dbm.__init__ gnu.db ndbm.db dumb.db other.db
dbm.dumb dumb.db
dbm.gnu gnu.db
dbm.ndbm ndbm.db
UNKNOWN other.db