+1 I think this makes a lot of sense. What would you name the built in?
-Joseph > On Feb 28, 2017, at 7:17 AM, Michel Desmoulin <[email protected]> > wrote: > > We have the immutable frozenset for sets and and tuples for lists. > > But we also have something to manipulate dict as immutable datastructures: > >>>> from types import MappingProxyType as idict >>>> d = idict({'a':1, 'b':2, 'c':3}) >>>> d['a'] = 4 > Traceback (most recent call last): > File "<ipython-input-3-c6f93d6278af>", line 1, in <module> > d['a'] = 4 > TypeError: 'mappingproxy' object does not support item assignment > > We could expose this as a built type to allow the last of the most > important data structure in Python to be easily immutable. > > _______________________________________________ > Python-ideas mailing list > [email protected] > https://mail.python.org/mailman/listinfo/python-ideas > Code of Conduct: http://python.org/psf/codeofconduct/ _______________________________________________ Python-ideas mailing list [email protected] https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
