On 02.03.17 10:36, M.-A. Lemburg wrote:
Why a new syntax ? Can't we just have a pre-defined sentinel singleton NoDefault and use that throughout the code (and also special case it in argument parsing/handling)?def get(store, key, default=NoDefault): if store.exists(key): return store.retrieve(key) ...
This means adding a new syntax. NoDefault should be a keyword (we can reuse existing keyword couldn't be used in expression), and it should be accepted only in the specific context of declaring function parameter.
_______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
