ImportError：无法导入名称＆＃39; main＆＃39;在macOS上安装AWS CLI时

Question

每次关注the instructions to install the AWS CLI时，我都会收到以下错误：

  

ImportError：无法导入名称＆＃39; main＆＃39;

这是我的终端的输出（显示每一步）

$ curl -O https://bootstrap.pypa.io/get-pip.py

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 1603k  100 1603k    0     0  1122k      0  0:00:01  0:00:01 --:--:-- 1123k

$ python3 get-pip.py --user

Collecting pip
  Using cached https://files.pythonhosted.org/packages/0f/74/ecd13431bcc456ed390b44c8a6e917c1820365cbebcb6a8974d1cd045ab4/pip-10.0.1-py2.py3-none-any.whl
Installing collected packages: pip
  Found existing installation: pip 10.0.1
    Uninstalling pip-10.0.1:
      Successfully uninstalled pip-10.0.1
Successfully installed pip-10.0.1

$ pip3 install awscli --upgrade --user

Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.6/bin/pip3", line 7, in <module>
    from pip import main
ImportError: cannot import name 'main'

运行pip版本10.0.1和Python 3.6。发生了什么事？