由于环境错误而无法安装软件包：安装AWS CLI时

Question

python get-pip.py
Collecting pip
  Downloading https://files.pythonhosted.org/packages/c2/d7/90f34cb0d83a6c5631cf                                                               71dfe64cc1054598c843a92b400e55675cc2ac37/pip-18.1-py2.py3-none-any.whl (1.3MB)
    100% |████████████████████████████████| 1.3MB 15.5MB/s
Collecting wheel
  Downloading https://files.pythonhosted.org/packages/ff/47/1dfa4795e24fd6f93d5d                                                               58602dd716c3f101cfd5a77cd9acbe519b44a0a9/wheel-0.32.3-py2.py3-none-any.whl
Installing collected packages: pip, wheel

  

由于环境错误而无法安装软件包：[Errno 13]权限被拒绝：'/usr/lib/python2.7/site-packages/pip'   考虑使用--user选项或检查权限。