linux 安装python3教程0到1&& 卸载python3编译，亲测版-优快云博客

本文详细介绍如何在Linux环境下从源码编译并安装Python 3.7.2版本，包括创建目录、下载源码包、配置依赖库、编译配置、编译安装及设置软链接等步骤。

cd /usr/local

mkdir python37

cd python37

wget wget https://www.python.org/ftp/python/3.7.2/Python-3.7.2.tar.xz

tar xvf Python-3.7.2.tar.xz

cd  Python-3.7.2

yum -y install zlib zlib-devel
yum -y install bzip2 bzip2-devel
yum -y install ncurses ncurses-devel
yum -y install readline readline-devel
yum -y install openssl openssl-devel
yum -y install openssl-static
yum -y install xz lzma xz-devel
yum -y install sqlite sqlite-devel
yum -y install gdbm gdbm-devel
yum -y install tk tk-devel
yum -y install libffi libffi-devel
 
./configure --prefix=/usr/python --enable-shared CFLAGS=-fPIC 
./configure --enable-optimizations
 
make && make install 
整个过程大约5-10分钟，安装成功之后，安装目录就在/usr/python

ln -s /usr/python/bin/python3 /usr/bin/python3
ln -s /usr/python/bin/pip3 /usr/bin/pip3
 这样就建立软连接好了，以后直接执行python3命令就可以调用python3了，执行pip3可以安装需要的python3模块；另外如果仔细看python安装目录下的bin目录，实际上python3也是个软链接，链接到python3.7.2，这样多次链接也是为了多个版本的管理更加方便，

cd /usr/bin

ls

查看到 python3链接效果

-rwxr-xr-x.   1 root root        186 Aug 20  2010 pygtk-demo
-rwxr-xr-x.   2 root root       6088 Nov 22  2013 python
lrwxrwxrwx.   1 root root          6 Sep 21 14:45 python2 -> python
-rwxr-xr-x.   2 root root       6088 Nov 22  2013 python2.6
lrwxrwxrwx.   1 root root         23 Mar  3 17:45 python3 -> /usr/python/bin/python3

遇到pip3 安装ssl解决见 问题见我博客另一篇：https://blog.youkuaiyun.com/chen498858336/article/details/88149499

      卸载python3
      rpm -qa|grep python3|xargs rpm -ev --allmatches --nodeps       
      whereis python3 |xargs rm -frv           
     删除所有残余文件
      成功卸载！
      whereis   python      
      查看现有安装的python

转载于:https://www.cnblogs.com/SunshineKimi/p/10841652.html