[issue35195] [Windows] Python 3.7 initializes LC_CTYPE locale at startup, causing performance issue on msvcrt isdigit()

[Dragoljub]

Dragoljub <dragoljub at gmail.com> added the comment:

On Python 3.7.1 and Windows 10:

I attempted locale.setlocale(locale.LC_ALL, "POSIX") --> Errors Out
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Error                                     Traceback (most recent call last)
<ipython-input-8-f384c02ab238> in <module>
----> 1 locale.setlocale(locale.LC_ALL, "POSIX")

D:\Python37\lib\locale.py in setlocale(category, locale)
    602         # convert to string
    603         locale = normalize(_build_localename(locale))
--> 604     return _setlocale(category, locale)
    605 
    606 def resetlocale(category=LC_ALL):

Error: unsupported locale setting


I was able to set the loacle to "C" but that does not improve the parsing performance.

locale.setlocale(locale.LC_ALL, "C") --> returns 'C'

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<https://bugs.python.org/issue35195>
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