Ubuntu 启动 Terminal 提示警告

Traceback (most recent call last):
File "/usr/lib/python2.7/runpy.py", line 174, in _run_module_as_main
"main", fname, loader, pkg_name)
File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
exec code in run_globals
File "/home/achilles/.local/lib/python2.7/site-packages/virtualenvwrapper/hook_loader.py", line 16, in <module>
from stevedore import ExtensionManager
File "/home/achilles/.local/lib/python2.7/site-packages/stevedore/init.py", line 11, in <module>
from .extension import ExtensionManager
File "/home/achilles/.local/lib/python2.7/site-packages/stevedore/extension.py", line 17, in <module>
import pkg_resources
ImportError: No module named pkg_resources
virtualenvwrapper.sh: There was a problem running the initialization hooks.
If Python could not import the module virtualenvwrapper.hook_loader,
check that virtualenvwrapper has been installed for
VIRTUALENVWRAPPER_PYTHON=/usr/bin/python and that PATH is
set properly.

依次执行以下代码即可：

sudo update-alternatives --install /usr/bin/python python /usr/bin/python2 100
sudo update-alternatives --install /usr/bin/python python /usr/bin/python3 150