On 10.05.2018 15:57, Guido van Rossum wrote: > On Thu, May 10, 2018 at 5:04 AM, M.-A. Lemburg <m...@egenix.com> wrote: > >> To a (former Pascal) programmer, a := 1 doesn't read like an >> operator. It's an assignment expression. If embedded expressions >> is where Python is heading, it should be made very clear where >> the embedded expression starts and where it ends on a line. >> > > The rules we've arrived at are about as straightforward as it gets: the RHS > of `:=` ends at the nearest comma or close parenthesis/bracket/brace.
That may be easy for a computer to parse, but it's not for a programmer. It would be better to contain such expressions inside a safe container which is clearly visible to a human eye. ohoh = a := (1, 2, 3), 4, a * 2 vs. aha = ((a := (1, 2, 3)), 4, a * 2) You'd simplify the above logic to: the RHS of ":=" ends at the nearest closing parenthesis. > OT about the name: despite Tim's relentless pushing of "binding > expressions" in the end I think they should be called "assignment > expressions" just like in C. -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Experts (#1, May 10 2018) >>> Python Projects, Coaching and Consulting ... http://www.egenix.com/ >>> Python Database Interfaces ... http://products.egenix.com/ >>> Plone/Zope Database Interfaces ... http://zope.egenix.com/ ________________________________________________________________________ ::: We implement business ideas - efficiently in both time and costs ::: eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611 http://www.egenix.com/company/contact/ http://www.malemburg.com/ _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
