[issue30338] LC_ALL=en_US + io.open() => LookupError: (osx)

[STINNER Victor]

STINNER Victor added the comment:

> It may be an OSX specific bug?

Yes, on Linux, it "just works":

haypo at selma$ LC_ALL=en_US python2 -c 'import io; io.open("/dev/null")'
haypo at selma$ LC_ALL=en_USxxx python2 -c 'import io; io.open("/dev/null")'

In fact, you get ASCII encoding for these two locales:

haypo at selma$ LC_ALL=en_US python2 -c 'import locale; print(locale.getpreferredencoding(False))'
ANSI_X3.4-1968

haypo at selma$ LC_ALL=en_USxxx python2 -c 'import locale; print(locale.getpreferredencoding(False))'
ANSI_X3.4-1968

Internally, io.open() uses locale.getpreferredencoding(False) if you don't specify an encoding.

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nosy: +haypo

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<http://bugs.python.org/issue30338>
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