[New-bugs-announce] [issue3282] Undefined unicode characters should be non-printable

[Amaury Forgeot d'Arc]

New submission from Amaury Forgeot d'Arc <amauryfa at gmail.com>:

str.isprintable() returns True for undefined unicode code points:

>>> c = "\ufffe"
>>> unicodedata.category(c)
'Cn'             # (Other, Not Assigned)
>>> c.isprintable()
True

Same for "\u0242", "\ufb12"...

The cause is probably in unicodectype.c: _PyUnicode_IsPrintable():
    return (ctype->flags & NONPRINTABLE_MASK) == 0;
but ctype->flags is 0 for undefined chars.

----------
components: Unicode
messages: 69254
nosy: amaury.forgeotdarc
severity: normal
status: open
title: Undefined unicode characters should be non-printable
versions: Python 3.0

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue3282>
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