[Bug] [misc] Use sys.getfilesystemencoding() to prevent possible locale errors

[archibate]

Related issue = taichi-dev/taichi_three#13 #428

See https://www.python.org/dev/peps/pep-0529/#update-sys-getfilesystemencoding.

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@k-ye Would you help me confirm this works on OS X for all locale combinations?

[codecov]

Codecov Report

Merging #1775 into master will increase coverage by 0.05%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #1775      +/-   ##
==========================================
+ Coverage   42.60%   42.66%   +0.05%     
==========================================
  Files          44       44              
  Lines        6182     6174       -8     
  Branches     1071     1074       +3     
==========================================
  Hits         2634     2634              
+ Misses       3394     3385       -9     
- Partials      154      155       +1     

Impacted Files	Coverage Δ
python/taichi/core/util.py	0.38% <0.00%> (-0.01%)	⬇️
python/taichi/code_format.py	12.00% <0.00%> (-0.38%)	⬇️
python/taichi/main.py	23.57% <0.00%> (+0.53%)	⬆️

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[k-ye]

LGTM

Would you help me confirm this works on OS X for all locale combinations?

I actually tried. My locale looks the same as taichi-dev/taichi_three#13 (comment), but I don't have this problem. Do you know how I can repro this?

[archibate]

Do you know how I can repro this?

I'm not sure, what's your MacOS and Python version? And the one in taichi_three#13?

[archibate]

Locales are always international packages' headache yet no way to test against them at the time being. Let's try to merge this in given that CI passed and we used enough try-except's here and hopefully it can solve the hidden locale problems :)

but I don't have this problem.

Actually are you testing in master without this PR?