创建celery项目目录
新建celery_tasks.py

import celery
import time
backend='redis://:@127.0.0.1:6379/3'
broker='redis://:@127.0.0.1:6379/2'
cel=celery.Celery('test',backend=backend,broker=broker)
@cel.task
def send_email(name):
    print("向%s发送邮件..."%name)
    time.sleep(5)
    print("向%s发送邮件完成"%name)
    return "ok"

@cel.task
def send_message(name):
    print("向%s发送短信..."%name)
    time.sleep(5)
    print("向%s发送短信完成"%name)
    return "ok"

新建执行produce_task.py

from celery_task import send_email,send_message
# .delay是celery自带的参数
result = send_email.delay("yuan")
print(result.id)
result2 = send_message.delay("alex")
print(result2.id)

运行结果result.py

from celery.result import AsyncResult
from celery_task import cel

# id就是之前的执行结果，也就是才能存入redis的key
# 通过AsyncResult调出结果,app是设置celery对象
async_result=AsyncResult(id="3489df42-d882-4411-818b-725a4a128b72", app=cel)

if async_result.successful():
    result = async_result.get()
    print(result)
   # 成功则返回ok
    # result.forget() # 将结果删除
elif async_result.failed():
    print('执行失败')
elif async_result.status == 'PENDING':
    print('任务等待中被执行')
elif async_result.status == 'RETRY':
    print('任务异常后正在重试')
elif async_result.status == 'STARTED':
    print('任务已经开始被执行')

启动celery服务命令(#必须在celery目录下执行，否则运行不了)
celery -A celery_task worker -l info

添加任务（执行produce_task.py)，检查任务执行结果（执行check_result.py）

多任务执行

任务目录

celery.py:

from celery import Celery

cel = Celery('celery_demo',
             broker='redis://127.0.0.1:6379/1',
             backend='redis://127.0.0.1:6379/2',
             # 包含以下两个任务文件，去相应的py文件中找任务，对多个任务做分类
             include=['celery_tasks.task01',
                      'celery_tasks.task02'
                      ])

# 时区
cel.conf.timezone = 'Asia/Shanghai'
# 是否使用UTC
cel.conf.enable_utc = False

task01.py,task02.py:

#task01
import time
from celery_tasks.celery import cel

@cel.task
def send_email(res):
    time.sleep(5)
    return "完成向%s发送邮件任务"%res



#task02
import time
from celery_tasks.celery import cel
@cel.task
def send_msg(name):
    time.sleep(5)
    return "完成向%s发送短信任务"%name

produce_task.py:

from celery_tasks.task01 import send_email
from celery_tasks.task02 import send_msg

# 立即告知celery去执行test_celery任务，并传入一个参数
result = send_email.delay('yuan')
print(result.id)
result = send_msg.delay('yuan')
print(result.id)

check_result.py:

from celery.result import AsyncResult
from celery_tasks.celery import cel

async_result = AsyncResult(id="562834c6-e4be-46d2-908a-b102adbbf390", app=cel)

if async_result.successful():
    result = async_result.get()
    print(result)
    # result.forget() # 将结果删除,执行完成，结果不会自动删除
    # async.revoke(terminate=True)  # 无论现在是什么时候，都要终止
    # async.revoke(terminate=False) # 如果任务还没有开始执行呢，那么就可以终止。
elif async_result.failed():
    print('执行失败')
elif async_result.status == 'PENDING':
    print('任务等待中被执行')
elif async_result.status == 'RETRY':
    print('任务异常后正在重试')
elif async_result.status == 'STARTED':
    print('任务已经开始被执行')

Celery执行定时任务

设定时间让celery执行一个定时任务，produce_task.py:

from celery_task import send_email
from datetime import datetime

# 方式一
# v1 = datetime(2020, 3, 11, 16, 19, 00)
# print(v1)
# v2 = datetime.utcfromtimestamp(v1.timestamp())
# print(v2)
# result = send_email.apply_async(args=["egon",], eta=v2)
# print(result.id)

# 方式二
ctime = datetime.now()
# 默认用utc时间
utc_ctime = datetime.utcfromtimestamp(ctime.timestamp())
from datetime import timedelta
time_delay = timedelta(seconds=10)
task_time = utc_ctime + time_delay

# 使用apply_async并设定时间
result = send_email.apply_async(args=["egon"], eta=task_time)
print(result.id)

多任务下目录结构

from datetime import timedelta
from celery import Celery
from celery.schedules import crontab

cel = Celery('tasks', broker='redis://127.0.0.1:6379/1', backend='redis://127.0.0.1:6379/2', include=[
    'celery_tasks.task01',
    'celery_tasks.task02',
])
cel.conf.timezone = 'Asia/Shanghai'
cel.conf.enable_utc = False

cel.conf.beat_schedule = {
    # 名字随意命名
    'add-every-10-seconds': {
        # 执行tasks1下的test_celery函数
        'task': 'celery_tasks.task01.send_email',
        # 每隔2秒执行一次
        # 'schedule': 1.0,
        # 'schedule': crontab(minute="*/1"),
        'schedule': timedelta(seconds=6),
        # 传递参数
        'args': ('张三',)
    },
    # 'add-every-12-seconds': {
    #     'task': 'celery_tasks.task01.send_email',
    #     每年4月11号，8点42分执行
    #     'schedule': crontab(minute=42, hour=8, day_of_month=11, month_of_year=4),
    #     'args': ('张三',)
    # },
}
# 启动 Beat 程序$ celery beat -A proj<br># Celery Beat进程会读取配置文件的内容，周期性的将配置中到期需要执行的任务发送给任务队列
 
# 之后启动 worker 进程.$ celery -A proj worker -l info 或者$ celery -B -A proj worker -l info