def all_subclasses(cls):
    """Generator yielding all subclasses of `cls` recursively"""
    for subcls in cls.__subclasses__():
        yield subcls
        for subsubcls in all_subclasses(subcls):
            yield subsubcls
def all_subclasses ( cls ) : for subcls in cls . __subclasses__ ( ) : yield subcls for subsubcls in all_subclasses ( subcls ) : yield subsubcls
Generator yielding all subclasses of `cls` recursively