[issue16125] open accepts arbitrary mode strings as long as they contain U

[Arfrever Frehtes Taifersar Arahesis]

Arfrever Frehtes Taifersar Arahesis added the comment:

Still reproducible with Python 2.7.10rc0 on GNU/Linux:

>>> open('/tmp/a', 'az')
<open file '/tmp/a', mode 'az' at 0x7f68b117e420>
>>> open('/tmp/a', 'rz')
<open file '/tmp/a', mode 'rz' at 0x7f68b117e4b0>
>>> open('/tmp/a', 'wz')
<open file '/tmp/a', mode 'wz' at 0x7f68b117e420>
>>> open('/tmp/a', 'zU')
<open file '/tmp/a', mode 'zU' at 0x7f68b117e4b0>

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16125>
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