sudo -H pip3.8 install -U --user pipenv -i https://pypi.doubanio.com/simple/

pipenv安装成功以后，如果还不能使用，那就手动添加环境变；

export PATH="$PATH:/home/chaoshu/.local/bin"

pip升级：
https://www.cnblogs.com/4wheel/p/8193255.html
pip安装时候更换国内源：
https://blog.csdn.net/nahanai/article/details/96435128

https://blog.csdn.net/jpch89/article/details/81952416

python3几个版本共存：
https://bbs.deepin.org/forum.php?mod=viewthread&tid=183807
ubuntu 安装python3.7 以及安装pip3 出现Command '('lsb_release', '-a')' returned non-zero exit status 1问题解决
https://www.cnblogs.com/longbigbeard/p/10028746.html
pip超时问题
https://www.jianshu.com/p/8e042b7e91b6
linux使用pipenv出现command not found的解决方法
https://www.jianshu.com/p/8321373af212
Pipenv使用方法：

https://segmentfault.com/a/1190000015389565 

注意，必须首先：
pipenv install --python 3.8

创建特定Python版本的环境，并进入环境

pipenv shell

否则直接运行：pipenv lock

出现如下错误：

pipenv ✘ Locking Failed! [ResolutionFailure]:

Locking [dev-packages] dependencies…
Building requirements...
Resolving dependencies...
✘ Locking Failed!   

...

pipenv.patched.notpip._vendor.urllib3.exceptions.ReadTimeoutError: HTTPSConnectionPool(host='files.pythonhosted.org', port=443): Read timed out.