python 2.7 安装篇

Installing Python 2.7 on Centos 6.5

Centos 6.* comes with Python 2.6, but we can’t just replace it with v2.7 because it’s used by the OS internally (apparently) so you will need to install v2.7 (or 3.x, for that matter) along with it. Fortunately, CentOS made this quite painless with their Software Collections Repository

sudo yum update # update yumsudo yum install centos-release-scl # install SCL sudo yum install python27 # install Python 2.7

To use it, you essentially spawn another shell (or script) while enabling the newer version of Python:

scl enable python27 bash

To install additional libraries, you will need to install PIP:

cd /opt/rh/python27/root/usr/bin/ # cd to the directory where SCL installs python
sudo LD_LIBRARY_PATH=$LD_LIBRARY_PATH ./easy_install-2.7 pip

error:

/opt/rh/python27/root/usr/lib64/libpython2.7.so.1.0

Then add dir /opt/rh/python27/root/usr/lib64 to file /etc/ld.so.confAnd run ldconfig. It solved my problem. Goodluck!

once installed, you can install PIP using

pip2.7

, e.g.:

sudo LD_LIBRARY_PATH=$LD_LIBRARY_PATH ./pip2.7 install requests 

NOTE: if your username doesn’t require root to install software, then
LD_LIBRARY_PATH andPATH is set up for you automatically by scl
. Also keep in mind that using SCL outside a shell (e.g., cronjobs) isn’t quite straightforward. Also, using virtualenv poses a challenge as well.

(Hack)Add in /etc/profile

export LD_LIBRARY_PATH=/opt/rh/python27/root/usr/lib64alias python=/opt/rh/python27/root/usr/bin/pythonalias pip=/opt/rh/python27/root/usr/bin/pip

Update pip

pip install -U pip