'AttributeError: _cant_write_msg'

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Originally reported by: gpjt (Bitbucket: gpjt, GitHub: gpjt)

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As of 12.0.2, installing to a non-writeable directory (eg. easy_install foo without sudo or the --user flag) gives the following error:

#!python

File "/usr/local/lib/python2.7/dist-packages/setuptools/command/easy_install.py", line 486, in cant_write_to_target
msg = self._cant_write_msg % (sys.exc_info()[1], self.install_dir,)
File "/usr/lib/python2.7/distutils/cmd.py", line 105, in __getattr__
raise AttributeError, attr
AttributeError: _cant_write_msg

The problem appears to be commit 3e99647 ("Extract messages as class attributes for nicer indentation") where the error message was extracted to the class variable
__cant_write_msg (two underscores) but the function cant_write_to_target looks it up using self._cant_write_msg (one underscore).

The other error messages (__not_exists_id, __not_exists_id) are OK so this is a single-character fix :-)

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• Bitbucket: https://bitbucket.org/pypa/setuptools/issue/339

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Original comment by jaraco (Bitbucket: jaraco, GitHub: jaraco):

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Reference the proper attribute. Fixes #339.

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Original comment by jaraco (Bitbucket: jaraco, GitHub: jaraco):

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Add test capturing Attribute error. Ref #339.

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Original comment by gpjt (Bitbucket: gpjt, GitHub: gpjt):

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Awesome, thanks! We'll stick with 12.0.1 for the time being but will keep an eye out for the next release.

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Original comment by jaraco (Bitbucket: jaraco, GitHub: jaraco):

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12.0.5 should be out now.