CentOS 下将 Python2 升级到Python3 1. 从Python官网到获取Python3的包, 切换到目录/usr/local/src #wget https://www.python.org/ftp/python/3.5.1/Python-3.5.1.tar.xz 2. 使用命令如下命令进行解压缩: xz -d Python-3.5.1.tar.xz tar -xf Python-3.5.1.tar 3. 在/usr/local路径下创建目录--python3.5, 为第4步的安装目录 $mkdir /usr/local/python3.5 4. 编译安装(会自动安装pip-7.1.2) $cd /usr/local/src/Python-3.5.1 #./configure --prefix=/usr/local/python3.5 #make all #make install #make clean #make distclean 5. 进入安装的绝对路径,检查是否安装成功 $ /usr/local/python3.5/bin/python3.5 -V Python 3.5.1 6.查看环境变量,启动python时默认按照PATH的顺序进行查找,在/usr/bin中的python此时为Python2.6的。 $echo $PATH /usr/lib/qt-3.3/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/home/gordon/bin 7.修改软连接,启动python时指向python3.5 备份python mv /usr/bin/python /usr/bin/python2.6.6 2 修改软连接 sudo ln -s /usr/local/python3.5/bin/python3 /usr/bin/python 8. 验证默认是否启动python3.5 $ python -V Python 3.5.1
阿里云python2.6.6 升级到python3.5
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