1、下载python3
wget https://www.Python.org/ftp/python/3.5.0/Python-3.5.0.tgz
注：如果在Linux中下载较慢，可以在Windows操作系统中去Python官网下载：https://www.python.org/downloads/release/python-350/
注意要下载Gzipped source tarball版本的，然后使用WinSCP将下载好的文件Python-3.5.0.tgz拖拽到linux中，后续步骤还是不变的。
2、解压
tar zxvf Python-3.5.0.tgz
3、进入Python-3.5.0文件夹
cd Python-3.5.0
4、配置安装位置
./configure --prefix=/usr/local/python3.5
注：如果没有安装C语言编译器会提示错误。如果出现错误，在联网的情况下使用 yum install gcc 命令安装gcc编译器
5、编译
make
6、安装
make install
7、下载并安装setuptools 18.5
wget https://bootstrap.pypa.io/ez_setup.py -O - | python
注：如果提示错误 --no-check-certificate
在wget后加上 --no-check-certificate :wget --no-check-certificate https://bootstrap.pypa.io/ez_setup.py -O - | python
8、备份原有python命令执行文件
mv /usr/bin/python /usr/bin/pythonbak
9、创建新python软连接
ln -s /usr/local/python3.5/bin/python3.5 /usr/bin/python
10、查看python版本
python
[root@localhost Python-3.5.0]# python
Python 3.5.0 (default, Oct 7 2016, 04:34:35)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-17)] on linux
Type "help", "copyright", "credits" or "license" for more information.
vim /usr/bin/yum
#!/usr/bin/python python修改为 python2.6
import sys
try:
import yum
except ImportError:
print >> sys.stderr, """
There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:
%s
Please install a package which provides this module, or
verify that the module is installed correctly.
It's possible that the above module doesn't match the
current version of Python, which is:
%s
If you cannot solve this problem yourself, please go to
the yum faq at:
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