Installing and compiling Python 2.7 on Centos 6.3

Posted: July 8, 2013 in Uncategorized

I would recommend python 2.7 on all local machines

I suspect everyone is already ok?

[root@apu etc]# python2.7 -V
Python 2.7.3

Instructions for python 2.7 install on windows 7, ubuntu, mac will be on another page.

Because of centos 6.3 on the cluster machines, we need both 2.6 and 2.7 to coexist there. hopefully only there.

Centos relies on python 2.6 for yum

if you install python 2.7 in any way other than the following you will destroy the system and make yum inoperable

zlib failure message may be from internal python scripts doing uncompression and they may be referring to python module files, rather than looking at links directly. Not sure.

I believe only the x86_64 zlib is needed. i.e. you don’t need 32-bit and 64-bit, but just follow these instructions. They worked on apu.0xdata.loc ( on 9/28/2012

to check centos version

[root@apu etc]# cat /etc/redhat-release
CentOS release 6.3 (Final)

How to install Python 2.7.3 on CentOS 6.2 (worked for 6.3 which is 0xdata install version)

stolen from Daniel Eriksson. Thanks Daniel!

Posted on 2012/06/25

CentOS 6.2 ships with Python 2.6.6 and depends on that specific version. Be careful not to replace it or bad things will happen. If you need access to a newer version of Python you must compile it yourself and install it side-by-side with the system version.

Here are the steps necessary to install Python 2.7.3. The procedure is exactly the same for installing Python 3.2.3, just make sure you use the command “python3.2 install” when you install distribute.

Execute all the commands below as root. Either log in as root temporarily or use sudo.

Install development tools

In order to compile Python you must first install the development tools:

yum groupinstall "Development tools"

You also need a few extra libs installed before compiling Python or else you will run into problems later when trying to install various packages:

yum install zlib-devel
yum install bzip2-devel
yum install openssl-devel
yum install ncurses-devel

Download, compile and install Python

cd /opt
tar xf Python-2.7.3.tar.bz2
cd Python-2.7.3
./configure --prefix=/usr/local
make && make altinstall

It is important to use altinstall instead of install, otherwise you will end up with two different versions of Python in the filesystem both named python.

After running the commands above your newly installed Python 2.7.3 interpreter will be available as /usr/local/bin/python2.7 and the system version of Python 2.6.6 will be available as /usr/bin/python and /usr/bin/python2.6.

you can create a symbolic link in /usr/local/bin and things should be fine be careful here:

cd /usr/local/bin
ls -ltr python*
ln -s /usr/local/bin/python2.7 /usr/local/bin/python

Installing and configuring distribute (setuptools)

After installing Python 2.7.3 you also need to install distribute (setuptools) so you can easily install new packages in the right location.

cd /opt
tar xf distribute-0.6.27.tar.gz
cd distribute-0.6.27
python2.7 install

The commands above will generate the script /usr/local/bin/easy_install-2.7. Use this script to install packages for your new Python version. You should be able to use “easy_install” if “which easy_install” points to the correct 2.7 versions

which easy_install
ls -ltr /usr/local/bin/easy_install*

easy_install-2.7 requests
easy_install-2.7 psutil
easy_install-2.7 paramiko

(easy_install should work too, if your PATH gets /usr/local/bin first)





Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s