Eryk Sun added the comment: I discussed character devices mostly because of the NUL device. It could be surprising that Python dies on an encoding error when output is redirected to NUL:
C:\>chcp 1252 Active code page: 1252 C:\>python -c "print('\u20ac')" > nul C:\>chcp 437 Active code page: 437 C:\>python -c "print('\u20ac')" > nul Traceback (most recent call last): File "<string>", line 1, in <module> File "C:\Program Files\Python36\lib\encodings\cp437.py", line 19, in encode return codecs.charmap_encode(input,self.errors,encoding_map)[0] UnicodeEncodeError: 'charmap' codec can't encode character '\u20ac' in position 0: character maps to <undefined> Unix has a similar problem: $ LANG=C python3 -c 'print("\u20ac")' > /dev/null Traceback (most recent call last): File "<string>", line 1, in <module> UnicodeEncodeError: 'ascii' codec can't encode character '\u20ac' in position 0: ordinal not in range(128) Except /dev/null isn't a TTY. Also, it's rare nowadays for the locale encoding in Unix systems to be something other than UTF-8. It would be useful if we special-cased NUL like we do for the Windows console, but just to make it use the backslashreplace error handler. Unfortunately I don't know how to do that without calling NtQueryObject, for which ObjectNameInformation (1) can't be used because it's undocumented [1]. GetFinalPathNameByHandle also can't be used because it requires file-system devices. As a crude workaround, we could lump together all non-console character devices (i.e. isatty() but not a console). That will affect serial devices, too, but I can't think of a good reason someone would redirect stdout or stderr to a COM port. [1]: https://msdn.microsoft.com/en-us/library/ff550964 ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue30410> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com