# 通过脚本同时运行几个spider
目录结构：
1.在命令行能通过的情况下创建两个spider如
TestSpider
Test2Spider
2.在items.py的同级目录创建run.py文件，有三种方式，任选其一，其代码如下：
方式一： 通过CrawlerProcess同时运行几个spider
run_by_CrawlerProcess.py源代码：
1 # 通过CrawlerProcess同时运行几个spider
2 from scrapy.crawler import CrawlerProcess
3 # 导入获取项目配置的模块
4 from scrapy.utils.project import get_project_settings
5 # 导入蜘蛛模块(即自己创建的spider)
6 from spiders.test import TestSpider
7 from spiders.test2 import Test2Spider
8
9 # get_project_settings() 必须得有，不然"HTTP status code is not handled or not allowed"
10 process = CrawlerProcess(get_project_settings())
11 process.crawl(TestSpider) # 注意引入
12 #process.crawl(Test2Spider) # 注意引入
13 process.start() 方式二：通过CrawlerRunner同时运行几个spider
run_by_CrawlerRunner.py源代码：
1 # 通过CrawlerRunner同时运行几个spider
2 from twisted.internet import reactor
3 from scrapy.crawler import CrawlerRunner
4 from scrapy.utils.log import configure_logging
5 # 导入获取项目配置的模块
6 from scrapy.utils.project import get_project_settings
7 # 导入蜘蛛模块(即自己创建的spider)
8 from spiders.test import TestSpider
9 from spiders.test2 import Test2Spider
10
11 configure_logging()
12 # get_project_settings() 必须得有，不然"HTTP status code is not handled or not allowed"
13 runner = CrawlerRunner(get_project_settings())
14 runner.crawl(TestSpider)
15 #runner.crawl(Test2Spider)
16 d = runner.join()
17 d.addBoth(lambda _: reactor.stop())
18 reactor.run() # the script will block here until all crawling jobs are finished 方式三：通过CrawlerRunner和链接(chaining) deferred来线性运行来同时运行几个spider
run_by_CrawlerRunner_and_Deferred.py源代码：
1 # 通过CrawlerRunner和链接(chaining) deferred来线性运行来同时运行几个spider
2 from twisted.internet import reactor, defer
3 from scrapy.crawler import CrawlerRunner
4 from scrapy.utils.log import configure_logging
5 # 导入获取项目配置的模块
6 from scrapy.utils.project import get_project_settings
7 # 导入蜘蛛模块(即自己创建的spider)
8 from spiders.test import TestSpider
9 from spiders.test2 import Test2Spider
10
11 configure_logging()
12 # get_project_settings() 必须得有，不然"HTTP status code is not handled or not allowed"
13 runner = CrawlerRunner(get_project_settings())
14
15 @defer.inlineCallbacks
16 def crawl():
17 yield runner.crawl(TestSpider)
18 #yield runner.crawl(Test2Spider)
19 reactor.stop()
20
21 crawl()
22 reactor.run() # the script will block here until the last crawl call is finished 3.修改两个spider文件引入items,和外部类的如(HeadersHelper.py)的引入模式（以run.py所在目录为中心）
原导入模式：
from ..items import ScrapydoubanmovieItem
from .HeadersHelper import HeadersHelper 注释：这种导入能够在命令行scrapy crawl Test正常运行
修改为：
from items import ScrapydoubanmovieItem
from .HeadersHelper import HeadersHelper 注释：修改后这种导入在命令行scrapy crawl Test会报错，但通过运行run.py文件，能够同时运行两个spider
4.按照运行python文件的方式运行run.py,可以得到结果