Error in installing setuptools (unorderable types: str() < NoneType())

问题

Python 3.4.2, 32 bit - Win 8.1, 64 bit

First I was trying to upgrade setuptools, but it was not successful. So I decided to uninstall the previous version. Now I can't install setuptools. I have tried the following:

pip install setuptools:

Exception:
Traceback (most recent call last):
  File "C:\Python34\lib\site-packages\pip\basecommand.py", line 232, in main
    status = self.run(options, args)
  File "C:\Python34\lib\site-packages\pip\commands\install.py", line 339, in run

    requirement_set.prepare_files(finder)
  File "C:\Python34\lib\site-packages\pip\req\req_set.py", line 229, in prepare_
files
    req_to_install.check_if_exists()
  File "C:\Python34\lib\site-packages\pip\req\req_install.py", line 928, in chec
k_if_exists
    self.satisfied_by = pkg_resources.get_distribution(self.req)
  File "C:\Python34\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", li
ne 461, in get_distribution
    dist = get_provider(dist)
  File "C:\Python34\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", li
ne 341, in get_provider
    return working_set.find(moduleOrReq) or require(str(moduleOrReq))[0]
  File "C:\Python34\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", li
ne 870, in require
    needed = self.resolve(parse_requirements(requirements))
  File "C:\Python34\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", li
ne 740, in resolve
    env = Environment(self.entries)
  File "C:\Python34\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", li
ne 927, in __init__
    self.scan(search_path)
  File "C:\Python34\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", li
ne 957, in scan
    self.add(dist)
  File "C:\Python34\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", li
ne 977, in add
    dists.sort(key=operator.attrgetter('hashcmp'), reverse=True)
TypeError: unorderable types: str() < NoneType()

Running (Invoke-WebRequest https://bootstrap.pypa.io/ez_setup.py).Content | python - in a powershell with admin privileges:

PS C:\Windows\system32> > (Invoke-WebRequest https://bootstrap.pypa.io/ez_setup.py).Content | python -
Invoke-WebRequest : The response content cannot be parsed because the Internet Explorer engine is not available, or
Internet Explorer's first-launch configuration is not complete. Specify the UseBasicParsing parameter and try again.
At line:1 char:4
+ > (Invoke-WebRequest https://bootstrap.pypa.io/ez_setup.py).Content | python -
+    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotImplemented: (:) [Invoke-WebRequest], NotSupportedException
    + FullyQualifiedErrorId : WebCmdletIEDomNotSupportedException,Microsoft.PowerShell.Commands.InvokeWebRequestCommand

(I'm not willing to install Internet Explorer right now, but if you think I have to, then I will.)

Downloaded the ez_setup.py and ran it:

Installing Setuptools
running install
Traceback (most recent call last):
  File "setup.py", line 180, in <module>
    dist = setuptools.setup(**setup_params)
  File "C:\Python34\lib\distutils\core.py", line 148, in setup
    dist.run_commands()
  File "C:\Python34\lib\distutils\dist.py", line 955, in run_commands
    self.run_command(cmd)
  File "C:\Python34\lib\distutils\dist.py", line 974, in run_command
    cmd_obj.run()
  File "C:\Users\a\AppData\Local\Temp\tmpo7o_bqrd\setuptools-11.3.1\setuptools\c
ommand\install.py", line 67, in run
    self.do_egg_install()
  File "C:\Users\a\AppData\Local\Temp\tmpo7o_bqrd\setuptools-11.3.1\setuptools\c
ommand\install.py", line 103, in do_egg_install
    cmd.ensure_finalized()  # finalize before bdist_egg munges install cmd
  File "C:\Python34\lib\distutils\cmd.py", line 107, in ensure_finalized
    self.finalize_options()
  File "C:\Users\a\AppData\Local\Temp\tmpo7o_bqrd\setuptools-11.3.1\setuptools\c
ommand\easy_install.py", line 319, in finalize_options
    self.index_url, search_path=self.shadow_path, hosts=hosts,
  File "C:\Users\a\AppData\Local\Temp\tmpo7o_bqrd\setuptools-11.3.1\setuptools\p
ackage_index.py", line 269, in __init__
    Environment.__init__(self,*args,**kw)
  File "C:\Users\a\AppData\Local\Temp\tmpo7o_bqrd\setuptools-11.3.1\pkg_resource
s\__init__.py", line 975, in __init__
    self.scan(search_path)
  File "C:\Users\a\AppData\Local\Temp\tmpo7o_bqrd\setuptools-11.3.1\pkg_resource
s\__init__.py", line 1005, in scan
    self.add(dist)
  File "C:\Users\a\AppData\Local\Temp\tmpo7o_bqrd\setuptools-11.3.1\pkg_resource
s\__init__.py", line 1025, in add
    dists.sort(key=operator.attrgetter('hashcmp'), reverse=True)
TypeError: unorderable types: str() < NoneType()
Something went wrong during the installation.
See the error message above.

Repairing python installation by running python-3.4.2.msi and choosing the repair option. But still no setuptools:

>pip install scipy -U
Collecting scipy from https://pypi.python.org/packages/source/s/scipy/
.0.tar.gz#md5=639112f077f0aeb6d80718dc5019dc7a
  Using cached scipy-0.15.0.tar.gz
  setuptools must be installed to install from a source distribution

I think uninstalling and reinstalling python would fix the problem, but before trying that I thought maybe you can help me to find the cause of the problem and the right way to fix this. Thanks.

回答1:

I was able to solve my problem (on Win 8.1 64bit, Python 3.4.2) with the change suggested here:

https://bitbucket.org/pypa/setuptools/pull-request/122/ensure-py_version-and-platform-are-str-in/diff#chg-pkg_resources/init.py

回答2:

Instead of downloading ez_setup.py, use get-pip.py instead. From the docs, if setuptools is not installed, it will install it first.

Since you're still getting an error, try installing pip and setuptools from Christoph Gohlke's Python Extension Packages for Windows repository. Make sure you download the 32-bit installers for Python 3.4. Once downloaded, run the .exe files and hopefully everything will be back to normal. There are tons of scientific computing packages there, so if you want numpy linked against Intel's MKL, and scipy, which uses the enhanced version of numpy, go right ahead!

回答3:

Well it seemed to me that my python installation was completely messed up. It could have been related to a temporary installation of python 2 on my system a few weeks ago. Anyway, I thought it would be easier for me to just uninstall and reinstall the whole thing. So I uninstalled python and then reinstalled, but even that was not enough. Finally, I manually deleted C:\Python34 and reinstalled python and now it works fine.

来源：https://stackoverflow.com/questions/27894825/error-in-installing-setuptools-unorderable-types-str-nonetype

标签

python

setuptools