[PyQt] Fwd: Logging UTF-8 when pyqtdeployed [CLOSED]

Dave Gradwell davegradwell at yahoo.co.uk
Thu Feb 9 00:24:00 GMT 2017

Just for the archives…
To workaround this, I changed my Python Logging configuration:
from	:	logging.basicConfig(filename=APP_LOG_PATH, level=logging.DEBU…..
to	:	logging.basicConfig(handlers=[logging.FileHandler(filename=APP_LOG_PATH, encoding='utf-8')], level=logging.DEBU…...
With the explicit encoding parameter, UTF-8 characters are now logged without complaint.

During investigation, I dumped os.environ in the different launching contexts and noticed:
- When launched from PyCharm, PYTHONIOENCODING and LC_CTYPE are set to “UTF-8” and “en_US.UTF-8” respectively.
- When invoked by launching .app/Contents/MacOS/<binary> from the Terminal.app, LANG is set to "en_GB.UTF-8”.
- When launched by pyqtdeploy, LANG is set to "en_GB.UTF-8” (perhaps unsurprisingly, as pyqtdeploy was itself launched from Terminal.app and presumably confers its environment onto the binary it makes and launches).
- When the app is just double-clicked, however, no environment variables are set relating to any of PYTHONIOENCODING, LC_CTYPE or LANG.   I see that __CF_USER_TEXT_ENCODING is set but I don’t think Python is particularly wowed by this.

I checked pyqtdeploy_start.cpp.  
locale_codec_name is "UTF-8” (which is good).  
I also hacked-in  Py_SetStandardStreamEncoding("UTF-8", "strict”);   just before   Py_Initialize();   but this had no discernible effect.

I wonder if the lack of 'LANGUAGE', 'LC_ALL', 'LC_CTYPE' or ‘LANG’ is causing Python to fall back on a more primitive encoding...

locale.getdefaultlocale()  consistently returns None, None.

Possibly of interest:
- https://docs.python.org/2/library/locale.html#locale.getdefaultlocale
- http://stackoverflow.com/questions/25661295/why-does-qcoreapplication-call-setlocalelc-all-by-default-on-unix-linux

Anyway I’m just sending this into the ether so maybe it can sit in the archives and possibly help someone else one day…
— Dave.

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