在Ubuntu 14.04中，使用PyCharm 2016.3，当我尝试安装软件包时，我得到以下内容：
$ pip install numpy
Traceback (most recent call last):
File "/usr/local/lib/python3.4/dist-packages/setuptools-18.1-py3.4.egg/pkg_resources/__init__.py", line 651, in _build_master
File "/usr/local/lib/python3.4/dist-packages/setuptools-18.1-py3.4.egg/pkg_resources/__init__.py", line 952, in require
File "/usr/local/lib/python3.4/dist-packages/setuptools-18.1-py3.4.egg/pkg_resources/__init__.py", line 844, in resolve
pkg_resources.VersionConflict: (pip 9.0.1 (/usr/local/lib/python3.4/dist-packages), Requirement.parse('pip==7.1.0'))
我尝试pip install --upgrade setuptools，pip uninstall pip尝试从头开始重试，pip install --upgrade pip都给出相同的例外。
有什么想法吗？