capybara/virtualenv/lib/python2.7/site-packages/pip/_vendor/pkg_resources/__init__.py
def _get_mro(cls):
    """Get an mro for a type or classic class"""
    if not isinstance(cls, type):
        class cls(cls, object): pass
        return cls.__mro__[1:]
    return cls.__mro__
def _get_mro(cls):
    """Get an mro for a type or classic class"""
    if not isinstance(cls, type):
        class cls(cls, object): pass
        return cls.__mro__[1:]
    return cls.__mro__
Get an mro for a type or classic class