On Thu, May 10, 2018 at 09:53:40AM -0400, Guido van Rossum wrote: [...] > So all in all I'm not sure I think this is important enough to support, and > the rule "Use `:=` in expressions, not as a top level assignment" seems > easier to explain and understand.
Like Terry, I too would find it useful to be able to use x := expression in the interactive interpreter to see the value immediately. But I'd rather start off by prohibiting := as a stand-alone statement, and relax the restriction later, than by allowing it and then regretting it later. I think the rule "binding expressions are prohibited as a stand-alone statement" might reduce some of the anxiety about having two ways to do assignment, even if the cost is that they are treated as a special case. (All other expressions are allowed as statements, even if they're pointless.) -- Steve _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
