Python中基于django项目导入Celery时报错

from celery import Celery
app = Celery('hello', broker='amqp://guest@localhost//')
@app.task
def hello():
  return 'hello world'

ImportError: cannot import name 'Celery' from 'celery' (E:\Program Files\python37\lib\site-packages\celery\__init__.py)