2018年01月09日 12:41 GMT+01:00 Yury Selivanov <[email protected]>: > But I'd be -1 on making all ContextVars have a None default > (effectively have a "ContextVar.get(default=None)" signature. This > would be a very loose semantics in my opinion.
Why do you think that it's a loose semantics? For me ContextVar/Context are similar to Python namespaces and thread local storage. To "declare" a variable in a Python namespace, you have to set it: "global x" doesn't create a variable, only "x = None". It's not possible to define a thread local variable without specifying a "default" value neither. Victor _______________________________________________ Python-Dev mailing list [email protected] https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com