python2.7+pip+virtualenv

原来OS里有python2.6，现安装python2.7且两者共存
安装依赖

yum install libxslt-devel libxml2-devel python-devel libevent-devel zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel mysql-devel

从源代码编译安装python

wget https://www.python.org/ftp/python/2.7.6/Python-2.7.6.tgz tar xf Python-2.7.6.tgz
cd Python-2.7.6
./configure --prefix=/usr/local
make
sudo make altinstall

如果出现问题，先删除python目录；rm -r

安装setuptools

wget --no-check-certificate https://pypi.python.org/packages/source/s/setuptools/setuptools-17.0.tar.gz tar xf setuptools-17.0.tar.gz
cd setuptools-17.0
/usr/local/bin/python2.7 setup.py install

安装pip

wget --no-check-certificate https://pypi.python.org/packages/source/p/pip/pip-6.1.1.tar.gz tar xvfz pip-6.1.1.tar.gz
cd pip-6.1.1
/usr/local/bin/python2.7 setup.py install

安装virtualenv

/usr/local/bin/pip2.7 install virtualenv

将/usr/local/bin加入PATH

vi .bashrc
export PATH=$PATH:/usr/local/bin
source .bashrc

python => python2.6

python2.7 => python2.7

使用virtualenv

cd python
virtualenv-3.4 buildenv
source buildenv/bin/activate

deactivate