STINNER Victor <victor.stin...@haypocalc.com> added the comment:
For unicode, ascii(x) is implemented as repr(x).encode('ascii',
'backslashreplace').decode('ascii').
repr(x) is "'" + x + "'" for printable characters (eg. U+1D121), and "'U+%08x'"
% ord(x) for not printable characters (eg. U+12FFF).
About the unexpected output, the problem is that ascii+backslashreplace encodes
non-BMP printable characters as b'\\uXXXX\\uXXXX' in narrow builds.
I don't see simple solution to encode non-BMP characters as b'\\UXXXXXXXX'
because the principle of error handler is that it escapes non encodable
characters one by one.
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue9804>
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