linux系统
1.下载python3.7.3源码压缩包https://www.python.org/downloads/release/python-373/
2.解压压缩包
sudo tar Jxvf Python-3.7.3.tar.xz
3.解决安装依赖
同时安装多个软件包（已安装的会自动忽略）, -y 表示对所有询问都回答 Yes
sudo apt-get install -y gcc make build-essential libssl-dev zlib1g-dev libbz2-dev libreadline-dev libsqlite3-dev wget curl llvm libncurses5-dev libncursesw5-dev xz-utils tk-dev libffi-dev liblzma-dev
4.进入解压后目录终端执行
sudo ./configure --prefix=/usr/local/Python-3.7.3 --with-ssl --enable-optimizations
5.执行sudo make && sudo make install
6.设置环境变量
打开~/.bashrc文件，写入PATH=$PATH:/usr/local/Python3.7.3/bin
或者设置软链接
ln -s /usr/local/Python-3.7.3 /usr/bin/python3
7.安装python所需的依赖
sudo apt-get install python3-pip
sudo apt-get install python3-venv