CentOS下Python2.6升级到Python3.5

1、下载python3.5

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]# pythonPython 3.5.0 (default, Oct  7 2016, 04:34:35) [GCC 4.4.7 20120313 (Red Hat 4.4.7-17)] on linuxType "help", "copyright", "credits" or "license" for more information.

11、修改yum配置文件
vim /usr/bin/yum

#!/usr/bin/python python修改为 python2.6import systry:    import yumexcept ImportError:    print >> sys.stderr, """\There was a problem importing one of the Python modulesrequired to run yum. The error leading to this problem was:   %sPlease install a package which provides this module, orverify that the module is installed correctly.It's possible that the above module doesn't match thecurrent version of Python, which is:%sIf you cannot solve this problem yourself, please go to the yum faq at: