centos 6 + python 2.6 Dockerfile https://hub.docker.com/r/mjhea0/centos-6-python-2.6/

Dockerfile

# base image
FROM centos:6

# install epel
RUN rpm --import http://dl.fedoraproject.org/pub/epel/RPM-GPG-KEY-EPEL-6 \
 && yum install -y epel-release

# install python
RUN yum install -y \
    git \
    python-pep8 \
    python-setupdocs \
    python-setuptools \
    rpm-build \
    python-pip \
    postgresql \
    postgresql-devel \
    python-cffi \
    libffi-devel \
    gcc \
    python-devel \
    openssl-devel \
    python-psycopg2 \
 && yum clean all

# set working directory
RUN mkdir -p /usr/src/app
WORKDIR /usr/src/app

# add requirements
ADD ./requirements.txt /usr/src/app/requirements.txt

# install requirements
RUN pip install cffi --upgrade
RUN pip install psycopg2==2.0.14
RUN pip install virtualenv