[Python-Dev] PEP 538 warning at startup: please remove it (original) (raw)
Victor Stinner victor.stinner at gmail.com
Mon Jun 12 04:56:31 EDT 2017
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Hi,
Nick Coghlan pushed his implementation of his PEP 538: nice! Nice step forward to UTF-8 everywhere ;-)
I would prefer to not be annoyed by warning messages about encodings at startup if possible:
"Python detected LC_CTYPE=C: LC_CTYPE coerced to C.UTF-8 (set another locale or PYTHONCOERCECLOCALE=0 to disable this locale coercion behavior)."
Python 3.7 is the only programming language that I know that complains about encoding at startup. Even if my code is 100% valid, PEP 8 compliant, don't emit any warning, etc. I will get the warning. It is not possible to ignore the warning... Like "yeah, I know that my locale is C, but it's not like I'm able to configure it."
haypo at selma$ export LANG= haypo at selma$ locale LANG= LC_CTYPE="POSIX" ...
haypo at selma$ ./python -c 'print("Hello World!")' # Python 3.7 Python detected LC_CTYPE=C: LC_CTYPE coerced to C.UTF-8 (set another locale or PYTHONCOERCECLOCALE=0 to disable this locale coercion behavior). Hello World!
haypo at selma$ python2 -c 'print("Hello World!")' # Python 2.7 Hello World!
haypo at selma$ perl -e 'print "Hello, world!\n"' # Perl 5.24 Hello, world!
haypo at selma$ ./c # C Hello World!
...
Note: I don't consider that 2>/dev/null is a good practice to ignore a single warning, since it will ignore all message written into stderr, including useful warnings like ResourceWarning or "Exception ignored ...".
Victor
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