Install Python 3.3 without breaking yum (RHEL / CentOS)

python33_install.sh

#!/bin/bash

echo "updating packages"
yum -y update

echo "install YUM development tools"
yum groupinstall -y development

echo "installing additional packages"
yum install -y zlib-dev openssl-devel sqlite-devel bzip2-devel

echo "downloading source archive"
wget http://www.python.org/ftp/python/3.3.3/Python-3.3.3.tar.xz

echo "source archive is compressed using XZ library"
echo "installing XZ libs"
yum install -y xz-libs

echo "decoding XZ archive"
xz -d Python-3.3.3.tar.xz

echo "extracting archive"
tar -xvf Python-3.3.3.tar

# Enter the extracted directory
cd Python-3.3.3

echo "configuring Python 3.3.3"
# set installation directory
./configure --prefix=/usr/local

echo "compiling source"
# Using make altinstall so system default python isn't overridden (which would break yum)
make
make altinstall

# access python without explicitly defining path
export PATH="/usr/local/bin:$PATH"

echo "install pip dependencies"
wget --no-check-certificate https://pypi.python.org/packages/source/s/setuptools/setuptools-1.4.2.tar.gz
tar -xvf setuptools-1.4.2.tar.gz

# Enter the extracted directory:
cd setuptools-1.4.2

# Install setuptools using Python 3.3
python3.3 setup.py install

echo "installing pip"
# pip python 3.3
curl https://bootstrap.pypa.io/get-pip.py | python3.3 -

echo "installing virtualenv"
# used to create isolated python environments
pip install virtualenv