Files used by Makefiles in several other projects.

make test

• python version:

    make PYTHON_VERSION='2.7.8' test
    make PYTHON_VERSION='2.7.8' virtualenv
  

• pep8 options:

    make PEP8_OPTIONS='--max-line-length=120' python-pep8
  

If you have already downloaded the tarballs you need (Python and/or virtualenv) you can work offline like this:

make ONLINE=false virtualenv