Linux下下载python3

1.下载
wget https://www.python.org/ftp/python/3.7.4/Python-3.7.4.tgz
2.解压
tar -xzvf Python-3.7.4.tgz
3.config
mkdir -p /usr/local/python3
./configure --prefix=/usr/local/python3/
4.make 编译
5.make install 安装
6.创建快捷方式
ln -s /usr/local/python3/bin/python3 /usr/bin/python3
ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3
7.更新pip3
pip3 install --upgrade pip
8.环境变量中添加/usr/local/python3
vi .bash_profile
修改
PATH=$PATH:$HOME/bin:/usr/local/python3/bin
退出编辑，激活配置：source .bash_profile
1.11.2.常见错误
错误：ModuleNotFoundError: No module named '_ctypes'
解决办法：yum install libffi-devel
错误：zipimport.ZipImportError: can‘t decompress data; zlib not availabl
解决办法：yum install zlib-devel
错误：No module named '_ssl'
解决办法：yum install openssl-devel，然后重新编译安装
错误：No module named '_sqlite3
解决办法：yum install sqlite-devel，然后重新编译安装
错误：ImportError: No module named Tkinter
解决办法：
yum install tkinter
yum -y install tcl-devel tk-devel
重新编译安装