On Wed, Jul 4, 2018 at 4:07 PM, Serhiy Storchaka <storch...@gmail.com> wrote: > 04.07.18 00:51, Chris Angelico пише: >> >> On Wed, Jul 4, 2018 at 7:37 AM, Serhiy Storchaka <storch...@gmail.com> >> wrote: >>> >>> I believe most Python users are not >>> professional programmers -- they are sysadmins, scientists, hobbyists and >>> kids -- >> >> >> [citation needed] > > > I don't understand what citation do you need.
Anything at all that suggests that "most Python users are not professional programmers". Anything beyond just a hunch of yours. >>> In particularly mutating and >>> non-mutating operations are separated. The assignment expression breaks >>> this. >> >> >> [citation needed] > > > In Python the assignment (including the augmented assignment) is a > statement, del is a statement, function and class declarations are > statements, import is a statement. Mutating methods like list.sort() and > dict.update() return None to discourage using them in expressions. This a > common knowledge, I don't know who's citation you need. "Assignment is a statement" -- that's exactly the point under discussion. "del is a statement" -- yes, granted "function and class declarations are statements" -- class, yes, but you have "def" and "lambda" as statement and expression equivalents. "import is a statement" -- but importlib.import_module exists for a reason So you have two statements (del and class), one statement with a function form (import), and one statement with an expression form (def/lambda). I'm going to assume that your term "mutating" there was simply a miswording, and that you're actually talking about *name binding*, which hitherto occurs only in statements. Yes, this is true. And it's the exact point under discussion - that restricting name bindings to statements is unnecessary. ChrisA _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
