如何在Mac上安装pip？

Question

我不知道在Mac上设置点子的正确方法。 我在Homebrew上安装了python @ 2。 当我尝试安装virtualenv时，出现以下错误：

Could not install packages due to an EnvironmentError: [Errno 13] Permission denied: '/lib/python2.7/site-packages/virtualenv.pyc'
Consider using the `--user` option or check the permissions.

这里是一些额外的诊断信息，可能会有所帮助。

Jacobs-MacBook-Pro:~ jacob$ pip -V 
pip 19.0.3 from /usr/local/lib/python2.7/site-packages/pip (python 2.7) 
Jacobs-MacBook-Pro:~ jacob$ python -m pip -V 
pip 19.1.1 from /Users/jacob/Library/Python/2.7/lib/python/site-packages/pip (python 2.7) 
Jacobs-MacBook-Pro:~ jacob$ which python 
/usr/local/bin/python 
Jacobs-MacBook-Pro:~ jacob$ ls -l /usr/local/bin/python 
lrwxr-xr-x 1 jacob admin 36 Jun 19 15:36 /usr/local/bin/python -> ../Cellar/python@2/2.7.16/bin/python 

网上有很多关于如何设置它的意见。 其中有些是旧的，例如使用easy_install ，似乎已弃用。 我尝试了一些不同的方法，但是还没有开始工作。

我想念什么？

Answer 1

我想到了：

Jacobs-MacBook-Pro:bin jacob$ brew doctor
Please note that these warnings are just used to help the Homebrew maintainers
with debugging if you file an issue. If everything you use Homebrew for is
working fine: please don't worry or file an issue; just ignore this. Thanks!

Warning: A .pydistutils.cfg file was found in $HOME, which may cause Python
builds to fail. See:
  https://bugs.python.org/issue6138
  https://bugs.python.org/issue4655
Jacobs-MacBook-Pro:~ jacob$ more .pydistutils.cfg 
[install]
prefix=

我隐约记得在过去的某个时候将该文件放在那里尝试使用Google App Engine SDK（ DistutilsOptionError：必须提供home或prefix / exec-prefix-不能同时提供 ）。 我刚刚将其删除，现在pip install正常！