async_decorator.py

from threading import Thread
try:
    import gevent
except ImportError:
    pass

def async(fn):
    def decorator(*args, **kwargs):
        # if use_greenlet:
        gevent.spawn(fn, *args, **kwargs)
        # else:
        # Thread(target=fn, args=tuple(args), kwargs=kwargs)
    return decorator


class Foo(object):

    def __init__(self, use_greenlet=False):
        self.use_greenlet = use_greenlet

    @async
    def do_job(self, param1):
        print("done", param1)

if __name__ == '__main__':
    foo = Foo(use_greenlet=True)
    foo.do_job("hello")