> norm=lambda m: m+(m and(m[-1]!= '\n'and'\n'or' ')or'\n')
Parentheses 1 2
1 0
quotes 1 0 1
0 1 0 1 0
OK I don't see any violation of quoting or parentheses matching. Still trying
to figure out what this lambda does.
--- Joseph S.
-----Original Message-----
From: Robin Becker <ro...@reportlab.com>
Sent: Wednesday, April 29, 2020 10:52 AM
To: Łukasz Langa <luk...@langa.pl>; python-list@python.org;
python-annou...@python.org
Subject: Re: [RELEASE] Python 3.9.0a6 is now available for testing
On 28/04/2020 16:52, Łukasz Langa wrote:
> On behalf of the entire Python development community, and the currently
> serving Python release team in particular, I’m pleased to announce the
> release of Python 3.9.0a6. Get it here:
>
....
thanks for the release; I tried to reply in the dev list, but failed miserably.
Sorry for any noise.
I see this simple difference which broke some ancient code which works in
Python 3.8.2
> $ python
> Python 3.8.2 (default, Apr 8 2020, 14:31:25) [GCC 9.3.0] on linux
> Type "help", "copyright", "credits" or "license" for more information.
>>>> norm=lambda m: m+(m and(m[-1]!='\n'and'\n'or'')or'\n')
>>>>
> robin@minikat:~/devel/reportlab/REPOS/reportlab/tests
> $ python39
> Python 3.9.0a6 (default, Apr 29 2020, 07:46:29) [GCC 9.3.0] on linux
> Type "help", "copyright", "credits" or "license" for more information.
>>>> norm=lambda m: m+(m and(m[-1]!='\n'and'\n'or'')or'\n')
> File "<stdin>", line 1
> norm=lambda m: m+(m and(m[-1]!='\n'and'\n'or'')or'\n')
> ^
> SyntaxError: invalid string prefix
>>>>
> robin@minikat:~/devel/reportlab/REPOS/reportlab/tests
> $ python39 -X oldparser
> Python 3.9.0a6 (default, Apr 29 2020, 07:46:29) [GCC 9.3.0] on linux
> Type "help", "copyright", "credits" or "license" for more information.
>>>> norm=lambda m: m+(m and(m[-1]!='\n'and'\n'or'')or'\n')
> File "<stdin>", line 1
> norm=lambda m: m+(m and(m[-1]!='\n'and'\n'or'')or'\n')
> ^
> SyntaxError: invalid string prefix
>>>>
so presumably there has been some parser / language change which renders
and'\n' illegal. Is this a real syntax error or an alpha issue? It looks like
the tokenization has changed. Putting in the obvious spaces removes the syntax
error.
--
Robin Becker
--
https://mail.python.org/mailman/listinfo/python-list
