[Pythonmac-SIG] PyObjC and macOS 10.12 (Sierra)

[Andrew Jaffe]

Dear Chris and Glyph,
> 
> On Sunday, September 11, 2016, Andrew Jaffe <a.h.jaffe at gmail.com> wrote:
> Dear Ronald,
> 
> Thanks, as usual, for all this.
> 
> I have upgraded to the GM version of 10.12 on the beta track. I use the python.org framework builds of python.
> 
> When I do "pip list --outdated", I get a long list:

….

> If I do the usual "pip --upgrade" for these, it fails, seemingly because of permissions (Apologies, but I don't have access to the messages anymore): it is clearly trying to delete these versions which seem to live in /System/Library/Frameworks/Python.framework/Versions/2.7/. This fails, of course, due to permissions (and system integrity protection).
> 
> You can, in fact, do the upgrade with the "--ignore-installed" flag in pip (although there's still a problem with pyobjc-framework-Message).
> 
> So: are these errors expected? Is it something in my particular setup? Or the beta program? Is "--ignore-installed" the correct solution?
> 
> Thanks,
> 
> Andrew
> 
>> On 13 Sep 2016, at 16:13, Christopher Barker <pythonchb at gmail.com> wrote:
>> 
>> If you are dealing with stuff in /System, then you are dealing with the Ape installed Python, not the Python.org build.
>> 
>> It's easy for "pip" and python to get out of sync. 
>> 
>> Try "which pip" to see which pip you are running.
>> 
>> This is why I recommend encoding pip via:
>> 
>> python -m pip [args]

[I tried to comment via the gmane newsgroup version of the lists and my messages never appeared so I hope this works…]

Just to be clear, I am indeed using the framework pip, which is part of why this is so confusing. In the past, as far as I know, it’s never tried to have anything to do with /System. Again, I don’t know if it’s something about macOS 10.12 Sierra, or my particular setup that is the problem. Also, to be clear, there are no PYTHON* or other environment variables that would affect the python path. Here is a failing session…

(Aside: I understand that "pyobjc-framework-Message” is actually a bad example: it is the only package that even —-ignore-installed actually fails on, because it has the "--single-version-externally-managed” problem which is a different kettle of fish. But I think the above error message is the same as the one that I would get for any of the other packages in question. Note that pip2 install works fine for packages other than those in my original list.)

$ command which pip2
/Library/Frameworks/Python.framework/Versions/2.7/bin/pip2

$ pip2 install --upgrade pyobjc-framework-Message
Collecting pyobjc-framework-Message
  Using cached pyobjc-framework-Message-3.1.1.tar.gz
Requirement already up-to-date: pyobjc-core>=3.1.1 in /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages (from pyobjc-framework-Message)
Requirement already up-to-date: pyobjc-framework-Cocoa>=3.1.1 in /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages (from pyobjc-framework-Message)
Installing collected packages: pyobjc-framework-Message
  Found existing installation: pyobjc-framework-Message 2.5.1
    Uninstalling pyobjc-framework-Message-2.5.1:
Exception:
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip/basecommand.py", line 215, in main
    status = self.run(options, args)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip/commands/install.py", line 317, in run
    prefix=options.prefix_path,
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip/req/req_set.py", line 736, in install
    requirement.uninstall(auto_confirm=True)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip/req/req_install.py", line 742, in uninstall
    paths_to_remove.remove(auto_confirm)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip/req/req_uninstall.py", line 115, in remove
    renames(path, new_path)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip/utils/__init__.py", line 267, in renames
    shutil.move(old, new)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/shutil.py", line 299, in move
    copytree(src, real_dst, symlinks=True)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/shutil.py", line 208, in copytree
    raise Error, errors
Error: [('/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC/Message/__init__.py', '/var/folders/bk/zdhpxqj14y5fzcvlpybb4b640000gn/T/pip-Gd3OiE-uninstall/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC/Message/__init__.py', "[Errno 1] Operation not permitted: '/var/folders/bk/zdhpxqj14y5fzcvlpybb4b640000gn/T/pip-Gd3OiE-uninstall/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC/Message/__init__.py'"), ('/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC/Message/__init__.pyc', '/var/folders/bk/zdhpxqj14y5fzcvlpybb4b640000gn/T/pip-Gd3OiE-uninstall/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC/Message/__init__.pyc', "[Errno 1] Operation not permitted: '/var/folders/bk/zdhpxqj14y5fzcvlpybb4b640000gn/T/pip-Gd3OiE-uninstall/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC/Message/__init__.pyc'"), ('/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC/Message/_metadata.py', '/var/folders/bk/zdhpxqj14y5fzcvlpybb4b640000gn/T/pip-Gd3OiE-uninstall/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC/Message/_metadata.py', "[Errno 1] Operation not permitted: '/var/folders/bk/zdhpxqj14y5fzcvlpybb4b640000gn/T/pip-Gd3OiE-uninstall/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC/Message/_metadata.py'"), ('/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC/Message/_metadata.pyc', '/var/folders/bk/zdhpxqj14y5fzcvlpybb4b640000gn/T/pip-Gd3OiE-uninstall/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC/Message/_metadata.pyc', "[Errno 1] Operation not permitted: '/var/folders/bk/zdhpxqj14y5fzcvlpybb4b640000gn/T/pip-Gd3OiE-uninstall/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC/Message/_metadata.pyc'"), ('/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC/Message', '/var/folders/bk/zdhpxqj14y5fzcvlpybb4b640000gn/T/pip-Gd3OiE-uninstall/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC/Message', "[Errno 1] Operation not permitted: '/var/folders/bk/zdhpxqj14y5fzcvlpybb4b640000gn/T/pip-Gd3OiE-uninstall/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC/Message'”)]