TypeError: a coroutine was expected, got None

Question

class Test():
    def send(self,dela,i):
        time.sleep(dela)
        print("process",i)
        return

    async def proc(self,dela):
        task=list()
        for i in range(5):
            task.append(asyncio.create_task(self.send(3,i)))
        res = await asyncio.gather(*task)
        print(res)
        return 

    def call(self):
        asyncio.run(self.proc(3))
        return "123"

obj=Test()
obj.call()

I want to run the send method in a for loop concurrently and dont want to wait for each iteration to be completed ,but in the end gather the tasks.