新版Python不再建议直接pip安装了，而是要使用虚拟环境
sudo apt install -y python3-dev python3-virtualenv
sudo apt install -y python3-dev python3-virtualenv
sudo apt install -y python3-dev python3-virtualenv
创建虚拟环境
virtualenv newenv
source newenv/bin/activate
# 取消激活
deactivate
virtualenv newenv
source newenv/bin/activate
# 取消激活
deactivate
virtualenv newenv source newenv/bin/activate # 取消激活 deactivate