如何更正pip的路径（python2.7）

Question

我的系统是ubuntu16.04我有python2.7和python3.5

在我使用alias python=python3 && unalias python

python2.7和python3.5混合

然后我发现我有两条路径是pip2.7

$ which -a pip
/usr/local/bin/pip
/home/user/.local/bin/

然后我删除python-pip $ sudo apt-get autoremove python-pip

并重新安装pip python get-pip.py --prefix=/usr/local/

$ which -a pip
/usr/local/bin/pip

当我尝试安装软件包时，结果是

$ sudo pip install numpy
/usr/local/lib/python2.7/dist-packages/pip/_vendor/requests/__init__.py:83: RequestsDependencyWarning: Old version of cryptography ([1, 2, 3]) may cause slowdown.
  warnings.warn(warning, RequestsDependencyWarning)
The directory '/home/user/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/home/user/.cache/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Requirement already satisfied: numpy in /home/user/.local/lib/python2.7/site-packages (1.15.2)

我该如何解决？ 任何想法？ 非常感谢

1. /usr/local/lib/python2.7/dist-packages/pip/_vendor/requests/ init .py：83：RequestsDependencyWarning：旧版本的加密技术（[1、2、3]）可能会导致速度变慢。 warnings.warn（警告，RequestsDependencyWarning）
2. 已满足要求：/home/user/.local/lib/python2.7/site-packages（1.15.2）中的numpy

Answer 1

当您像这样运行sudo ，HOME仍然是您的（非root用户）家。 因此，它创建的任何目录（如直接缓存）都将由root拥有。 您只需要：

sudo rm -rf /home/user/.cache/pip/http

删除缓存目录。 以非超级用户身份再次运行它，您将不会看到错误。