CentOS7.3安装Python3.6

yum install -y gcc zlib-devel openssl-devel bzip2-devel expat-devel gdbm-devel readline-devel sqlite-devel ncurses-devel xz-devel tk-devel

2.下载

wget https://www.python.org/ftp/python/3.6.2/Python-3.6.2rc1.tar.xz
xz -d Python-3.6.2rc1.tar.xz
tar -xvf Python-3.6.2rc1.tar

3.进入源代码包并编译安装

cd Python-3.6.2rc1/
./configure --prefix=/usr/local/python3 --enable-optimizations

参数，–prefix 是安装目录，–enable-optimizations 是启用优化选项（LTO，PGO 等），会增加编译时间

make
make install

Warning：make install can overwrite or masquerade the python3 binary. make altinstall is therefore recommended instead of make install since it only installs exec_prefix/bin/pythonversion.

/usr/local/python3/bin/python3 --version

Python 3.6.2rc1

ln -s /usr/local/python3/bin/python3 /usr/bin/python3

[root@CentOS7 ~]# python3
Python 3.6.2rc1 (default, Jul 6 2017, 12:02:07)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-11)] on linux
Type “help”, “copyright”, “credits” or “license” for more information.
>>>

 

系统里还有2.7.5版本，可创建虚拟环境

（以下步骤可忽略，参考文档：https://docs.python.org/3/library/venv.html）

python3 -m venv py3

激活虚拟环境

source py3/bin/activate

查看版本

python -V

Python 3.6.2rc1

[root@CentOS7 ~]# python3 -m venv py3
[root@CentOS7 ~]# source py3/bin/activate
(py3) [root@CentOS7 ~]# python -V
Python 3.6.2rc1