python2 和python3 共存 scrapy 启动问题

python3 -m scrapy crawl 工程名称

python -m scrapy crawl 工程名称

定时循环执行scrapy 项目，用schedulers框架

from scrapy.cmdline import  execute
import os
from apscheduler.schedulers.blocking import BlockingScheduler
# execute(["scrapy","crawl","工程名称"]) 注：此命令只执行一次，不会循环

def start ():
    setreq.set_request()
    cmd='python3 -m scrapy crawl jmd'
    os.system(cmd)



if __name__ == '__main__':
    start()
    sched=BlockingScheduler()
    sched.add_job(start,'cron',day='*',hour='1')
    print('每天一点执行')
    sched.start()