Install newest pip, setuptools, virtualenv with your python app dependencies.

pip.yaml

download_pip:
    cmd.run:
        - name: "curl -O https://raw.github.com/pypa/pip/master/contrib/get-pip.py"
        - cwd: /tmp
        - unless: "test -f /tmp/get-pip.py"
        - require:
            - pkg: curl

install_pip:
    cmd.run:
        - name: "python get-pip.py"
        - cwd: /tmp
        - reload_modules: true
        - require:
            - cmd: download_pip

install_virtualenv:
    pip.installed:
        - name: virtualenv
        - require:
            - cmd: install_pip

create_virtualenv:
    virtualenv.managed:
        - name: app
        - system_site_packages: False
        - require:
            - pip: install_virtualenv

install_app_packages:
    pip.installed:
        - requirements: path/to/app/requirements.txt
        - bin_env: path/to/virtualenvs/app
        - require:
            - virtualenv: create_virtualenv