On 16/07/2020 17:37, Steve Holden wrote:
While I understand the point of view that says that match ... :
should encapsulate a sequence of indented suites, it seems to me that
match/case/case/.../else has a natural affinity with
try/except/except/.../finally/else, and nobody seems to think that the
excepts should be indented. Or the finally. And naturally the match/else
case are at the same indentation level, just as for/else, while/else and
try/finally. So why, exactly, should case be indented?
My take on the difference would be that "try" tries out a suite, while
"match" matches an expression. If we did:
match:
<expression>
case <pattern>:
<suite>
then having an indented section which must be a single expression would
be unique in Python syntax. I could easily see people being confused
when the slew of statements they would inevitably decide they must be
able to put there, and soon we'd have cats and dogs living together and
the downfall of civilisation as we know it.
Alternatively:
match <expression>:
case <pattern>:
<suite>
would be the one place in Python where you end a line with a colon and
*don't* indent the following line. Writers of simple formatters and the
like (such as Python-mode in Emacs) would curse your name, etc, etc.
My apologies for being a Bear of Very Little Brain.
Nah, don't apologise. This is one of those things that everyone has
opinions on, because there doesn't seem to be an obvious Right Answer.
--
Rhodri James *-* Kynesim Ltd
_______________________________________________
Python-Dev mailing list -- python-dev@python.org
To unsubscribe send an email to python-dev-le...@python.org
https://mail.python.org/mailman3/lists/python-dev.python.org/
Message archived at
https://mail.python.org/archives/list/python-dev@python.org/message/JYDDPBDO56EQWTFSWY2NNDNT2NDHWXG5/
Code of Conduct: http://python.org/psf/codeofconduct/
