On Sun, May 13, 2018 at 8:47 AM, Juancarlo Añez <apal...@gmail.com> wrote: > >> My main point here is that "with" works as well as "given" in this form >> from an English prose point of view. > > > +1 for "with...as", -1 for ":=" > > About affecting existing contexts, it seems that "with..as" would create a > new context just for the expression, and the control statement it is > embedded in, similar to what the current "with" statement does. These are > semantics that are really easy to explain.
The trouble with every variant involving 'with' is that the semantics LOOK similar, but are subtly different. The current 'with' statement doesn't create a subscope; the only "context" it creates is regarding the resource represented by the context manager. For instance, opening a file in a 'with' block will close the file at the end of the block - but you still have a (closed) file object. Using "with... as" for name bindings wouldn't call __enter__ or __exit__, so it won't create that kind of context; and whether it creates a subscope for the variable or not, it's not going to match the 'with' statement. ChrisA _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
