Zachary Ware added the comment:
What type are your arguments, str, unicode, or a mix? I can reproduce your
issue using a unicode and a str containing a non-ASCII character, while any
other combination "works":
>>> import os
>>> os.path.join('test', 'test\x85')
'test\\test\x85'
>>> os.path.join('test', u'test\x85')
u'test\\test\x85'
>>> os.path.join(u'test', 'test\x85')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Python27\lib\ntpath.py", line 84, in join
result_path = result_path + p_path
UnicodeDecodeError: 'ascii' codec can't decode byte 0x85 in position 4: ordinal
not in range(128)
>>> os.path.join(u'test', u'test\x85')
u'test\\test\x85'
The fact that any mixed-type combination works is sheer accident. This is just
a side effect of Python 2's 'bolted-on' approach to Unicode, and the fix is to
upgrade to Python 3. If you have to stay with Python 2, you can try to fix
your code by making sure you decode all input to unicode as soon as you get it,
and only encode to str when you have to (which is basically what you need to do
in Python 3, but Python won't give you helpful exceptions at the source of the
problem in 2.x).
I don't believe there's anything that should be changed in ntpath.join.
----------
nosy: +zach.ware
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<http://bugs.python.org/issue22019>
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