运行celery后没有received task字样，在ready 这一行就停住了
tasks.py :
import time
from celery import Celery
broker = 'redis://:123456@localhost:6379/1'
backend= 'redis://:123456@localhost:6379/2' #存储结果
app = Celery('my_task', broker = broker, backend=backend )
@app.task
def add(x,y):
print('enter call func......')
time.sleep(4)
return x+yapp.py
if __name__ == '__main__':
print('start task...')
result = add.delay(2,8)
print("end task...")
print result
