1、错误1：
安装virtualenvwrapper报错：
报错内容：
Couldn't find index page for 'pbr' (maybe misspelled?)
Download error on https://pypi.python.org/simple/: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:645) -- Some packages may not be found!
No local packages or download links found for pbr
Traceback (most recent call last):
File "", line 1, in
File "/tmp/pip-build-6hblrn57/virtualenvwrapper/setup.py", line 7, in
pbr=True,
File "/usr/lib/python3.5/distutils/core.py", line 108, in setup
_setup_distribution = dist = klass(attrs)
File "/usr/lib/python3/dist-packages/setuptools/dist.py", line 269, in __init__
self.fetch_build_eggs(attrs['setup_requires'])
File "/usr/lib/python3/dist-packages/setuptools/dist.py", line 313, in fetch_build_eggs
replace_conflicting=True,
File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 826, in resolve
dist = best[req.key] = env.best_match(req, ws, installer)
File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 1092, in best_match
return self.obtain(req, installer)
File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 1104, in obtain
return installer(requirement)
File "/usr/lib/python3/dist-packages/setuptools/dist.py", line 380, in fetch_build_egg
return cmd.easy_install(req)
File "/usr/lib/python3/dist-packages/setuptools/command/easy_install.py", line 657, in easy_install
raise DistutilsError(msg)
distutils.errors.DistutilsError: Could not find suitable distribution for Requirement.parse('pbr')
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-6hblrn57/virtualenvwrapper/
解决办法：
sudo pip install-i https://pypi.tuna.tsinghua.edu.cn/simple pbr
sudo pip install-i https://pypi.tuna.tsinghua.edu.cn/simple--no-deps stevedore
sudo pip install-i https://pypi.tuna.tsinghua.edu.cn/simple--no-deps virtualenvwrapper
2、错误2
执行命令 source ~/.bashrc出错：
shuhaishiyi@shuhaishiyi:~$ source~/.bashrc
/usr/bin/python:Nomodule named virtualenvwrapper
virtualenvwrapper.sh:Therewas a problem running the initialization hooks.
IfPythoncouldnotimportthe module virtualenvwrapper.hook_loader,
check that virtualenvwrapper has been installedfor
VIRTUALENVWRAPPER_PYTHON=/usr/bin/pythonandthat PATHis
set properly.
解决办法：“加粗斜体”的部分将ubuntu中路径设置为python3（当py2和py3共存的时候）
在~/.bashrc文件的最下方加入下面语句：
if [ -f /usr/local/bin/virtualenvwrapper.sh ]; then
export WORKON_HOME=$HOME/.virtualenvs
export VIRTUALENVWRAPPER_PYTHON=/usr/bin/python3
source /usr/local/bin/virtualenvwrapper.sh
fi
如果还不能解决就结合错误信息与提示找到的语句，猜测应该是VIRTUALENVWRAPPER_PYTHON这里有问题，然后在virtualenvwrapper.sh文件中查找VIRTUALENVWRAPPER_PYTHON，发现了关键点：（我这里直接用pip3从新安装virtualenv和virtualenvwrapper）
1 # Locate the global Python where virtualenvwrapper is installed.
2 if [ "${VIRTUALENVWRAPPER_PYTHON:-}" = "" ]
3 then
4 VIRTUALENVWRAPPER_PYTHON="$(command \which python3)" # 原本是写的\which python，这里贴出来的是我修改为python3后的。
5 fi
链接：https://www.jianshu.com/p/842eced0df69