安装pip报错Traceback (most recent call last): File "get-pip.py", line 22318, in main()

首选说明，我全部注释了Ubuntu自带的源，全改成了aliyun的源头，并且出于F墙状态

deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse

某些源可能找不到这个 python3-distutils 包，反正至少上面这个可以找到，当前日期2019年12月27日。

问题背景：
WSL Ubuntu，自带python 3.6.7，想要安装pip环境，以便进一步安装其他环境。
但是现在试图安装pip的过程中报错:

1. 先下载get-pip.py 文件。
2. 执行命令 python3 get-pip.py,报错。
3. 报错内容如下

root@zs-pc:/home/zs# python3 get-pip.py 
Traceback (most recent call last):
  File "get-pip.py", line 22318, in <module>
    main()
  File "get-pip.py", line 198, in main
    bootstrap(tmpdir=tmpdir)
  File "get-pip.py", line 82, in bootstrap
    import pip._internal.main
  File "/tmp/tmp0na1bhuz/pip.zip/pip/_internal/main.py", line 13, in <module>
  File "/tmp/tmp0na1bhuz/pip.zip/pip/_internal/cli/autocompletion.py", line 11, in <module>
  File "/tmp/tmp0na1bhuz/pip.zip/pip/_internal/cli/main_parser.py", line 7, in <module>
  File "/tmp/tmp0na1bhuz/pip.zip/pip/_internal/cli/cmdoptions.py", line 19, in <module>
ModuleNotFoundError: No module named 'distutils.util'

如下图:

解决办法：

在这个页面找到了办法。

Issue with “python3 get-pip.py --user” with python 3.6.7 #43

找到办法的楼层如图：

于是，

1. 先执行这一条命令，sudo apt-get install python3-distutils
2. 然后得到这样一个东西 python3-distutils_3.6.9-1~18.04_all.deb
3. 再执行之前的python3 get-pip.py命令即可。
   执行后如图：
   
   然后pip可用，就不上图了。