python - 升级后 pip 不工作

Question

我尝试用这个命令升级 pip3：

sudo pip3 install --upgrade pip

但遗憾的是它不再工作并显示此消息：

pip3 --version

留言：

Traceback (most recent call last):
File "/usr/local/lib/python3.4/dist-packages/pkg_resources/init.py", line 651, in _build_master ws.require(requires)
File "/usr/local/lib/python3.4/dist-packages/pkg_resources/init.py", line 952, in require needed = self.resolve(parse_requirements(requirements))
File "/usr/local/lib/python3.4/dist-packages/pkg_resources/init.py", line 844, in resolve raise VersionConflict(dist, req).with_context(dependent_req) pkg_resources.VersionConflict: (pip 7.1.2 (/usr/local/lib/python3.4/dist-packages), Requirement.parse('pip==1.5.6'))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/local/bin/pip3", line 5, in from pkg_resources import load_entry_point
File "/usr/local/lib/python3.4/dist-packages/pkg_resources/init.py", line 3084, in @_call_aside
File "/usr/local/lib/python3.4/dist-packages/pkg_resources/init.py", line 3070, in _call_aside f(*args, **kwargs)
File "/usr/local/lib/python3.4/dist-packages/pkg_resources/init.py", line 3097, in _initialize_master_working_set working_set = WorkingSet._build_master()
File "/usr/local/lib/python3.4/dist-packages/pkg_resources/init.py", line 653, in _build_master return cls._build_from_requirements(requires)
File "/usr/local/lib/python3.4/dist-packages/pkg_resources/init.py", line 666, in _build_from_requirements dists = ws.resolve(reqs, Environment())
File "/usr/local/lib/python3.4/dist-packages/pkg_resources/init.py", line 839, in resolve raise DistributionNotFound(req, requirers) pkg_resources.DistributionNotFound: The 'pip==1.5.6' distribution was not found and is required by the application

如何解决？

Answer 1

您似乎没有使用 virtualenv，您的 pythons/paths 可能搞砸了。 我在 Ubuntu 14.04 上遇到了 python-2.7 和 -3.4 的类似问题。我试过了

sudo python -m pip install --upgrade --force-reinstall pip

对于 2.7，它有所帮助。然后我通过 easy_install3.

为 python-3.4 重新安装了 pip