“pkg_resources.DistributionNotFound” at pip and easy install

问题

I have to install a package via pip (in detail: the package lxml) into Python2.7 on our server (running on ScientificLinux). There is running Python 2.6 and 2.7.

The command pip points to our Python2.6 installation where the package already exists. When I try to run pip-2.7, he is throwing the following errors:

 Traceback (most recent call last):
  File "/usr/local/bin/pip-2.7", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/usr/lib/python2.6/site-packages/pkg_resources.py", line 2659, in <module>
    parse_requirements(__requires__), Environment()
  File "/usr/lib/python2.6/site-packages/pkg_resources.py", line 546, in resolve
    raise DistributionNotFound(req)
pkg_resources.DistributionNotFound: pip==1.4.1

Thats a well known problem here (Link), but the accepted answer doesn't work. When I want to upgrade pip via easy_install, I get a similar error like the one above:

Traceback (most recent call last):
  File "/usr/local/bin/easy_install", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/usr/lib/python2.6/site-packages/pkg_resources.py", line 2659, in <module>
    parse_requirements(__requires__), Environment()
  File "/usr/lib/python2.6/site-packages/pkg_resources.py", line 546, in resolve
    raise DistributionNotFound(req)
pkg_resources.DistributionNotFound: distribute==0.6.49

I found already a possible solution here, but it also doesn't help, the versions are set right :/

回答1:

Have you tried using one of the installers on Christopher Gohlke's site? This is a tremendous resource for Windows users (I myself have found them extremely helpful.) He has a number of lxml installers.

来源：https://stackoverflow.com/questions/20282679/pkg-resources-distributionnotfound-at-pip-and-easy-install

标签

python-2.7

pip

easy-install