通过python代码调起scrapy程序，优雅的将scrapy嵌套进其他程序中，极其简单，可以多进程调起

#! usr/bin/env python
# coding=utf-8
from scrapy import cmdline
import time

def start():
    cmdline.execute('scrapy crawl spider_name'.split())
    cmdline.execute('scrapy crawl spider_name'.split())
    cmdline.execute('scrapy crawl spider_name'.split())
    cmdline.execute('scrapy crawl spider_name'.split())
    cmdline.execute('scrapy crawl spider_name'.split())
    cmdline.execute('scrapy crawl spider_name'.split())

if '__main__' == __name__:
    start()