From the given ``module_name`` import
    the value for ``attr`` (attribute).

def _import_attr_n_module(module_name, attr):
    """From the given ``module_name`` import
    the value for ``attr`` (attribute).
    """
    __import__(module_name)
    module = sys.modules[module_name]
    attr = getattr(module, attr)
    return attr, module