cleanup: use standard NotImplementedError for abstract methods From the Python docs on NotImplementedError: In user defined base classes, abstract methods should raise this exception when they require derived classes to override the method.

[tox]
minversion = 1.8
envlist = py{26,27}-pytest

[testenv]
setenv =
    PYTHONHASHSEED = 0
deps =
    -r{toxinidir}/dev_requirements.txt
    py26-pytest: unittest2
    python-ldap
    python-pam
commands =
    pytest: py.test {posargs}