scrapy设置日志报错级别

在执行scrapy crawl xxx 的时候，我们在终端经常看见一大堆的信息，比如

2019-07-11 17:16:41 [scrapy.utils.log] INFO: Scrapy 1.6.0 started (bot: hsh_research)
2019-07-11 17:16:41 [scrapy.utils.log] INFO: Versions: lxml 4.2.2.0, libxml2 2.9.5, cssselect 1.0.3, parsel 1.5.1, w3lib 1.20.0, Twisted 19.2.1, Python 3.6.5 (v3.6.5:f59c0932b4, Mar 28 2018, 17:00:18) [MSC v.1900 64 bit (AMD64)], pyOpenSSL 19.0.0 (OpenSSL 1.1.1c  28 May 2019), cryptography 2.7, Platform Windows-7-6.1.7601-SP1
2019-07-11 17:16:41 [scrapy.crawler] INFO: Overridden settings: {'BOT_NAME': 'hsh_research', 'NEWSPIDER_MODULE': 'hsh_research.spiders', 'SPIDER_MODULES': ['hsh_research.spiders']}
2019-07-11 17:16:41 [scrapy.extensions.telnet] INFO: Telnet Password: 1c151e3b9cbebcb7
2019-07-11 17:16:41 [scrapy.middleware] INFO: Enabled extensions:
['scrapy.extensions.corestats.CoreStats',
 'scrapy.extensions.telnet.TelnetConsole',
 'scrapy.extensions.logstats.LogStats']
2019-07-11 17:16:42 [scrapy.middleware] INFO: Enabled downloader middlewares:
['scrapy.downloadermiddlewares.httpauth.HttpAuthMiddleware',
 'scrapy.downloadermiddlewares.downloadtimeout.DownloadTimeoutMiddleware',
 'scrapy.downloadermiddlewares.defaultheaders.DefaultHeadersMiddleware',
 'scrapy.downloadermiddlewares.useragent.UserAgentMiddleware',
 'scrapy.downloadermiddlewares.retry.RetryMiddleware',
 'scrapy.downloadermiddlewares.redirect.MetaRefreshMiddleware',
 'scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware',
 'scrapy.downloadermiddlewares.redirect.RedirectMiddleware',
 'scrapy.downloadermiddlewares.cookies.CookiesMiddleware',
 'scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware',
 'scrapy.downloadermiddlewares.stats.DownloaderStats']
2019-07-11 17:16:42 [scrapy.middleware] INFO: Enabled spider middlewares:
['scrapy.spidermiddlewares.httperror.HttpErrorMiddleware',
 'scrapy.spidermiddlewares.offsite.OffsiteMiddleware',
 'scrapy.spidermiddlewares.referer.RefererMiddleware',
 'scrapy.spidermiddlewares.urllength.UrlLengthMiddleware',
 'scrapy.spidermiddlewares.depth.DepthMiddleware']
2019-07-11 17:16:42 [scrapy.middleware] INFO: Enabled item pipelines:
[]
2019-07-11 17:16:42 [scrapy.core.engine] INFO: Spider opened
2019-07-11 17:16:42 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2019-07-11 17:16:42 [scrapy.extensions.telnet] INFO: Telnet console listening on 127.0.0.1:6023
2019-07-11 17:16:42 [scrapy.core.engine] DEBUG: Crawled (200) <GET http://chem.chem99.com/news/s221.html> (referer: None)
2019-07-11 17:16:43 [scrapy.core.engine] INFO: Closing spider (finished)
2019-07-11 17:16:43 [scrapy.statscollectors] INFO: Dumping Scrapy stats:
{'downloader/request_bytes': 228,
 'downloader/request_count': 1,
 'downloader/request_method_count/GET': 1,
 'downloader/response_bytes': 11125,
 'downloader/response_count': 1,
 'downloader/response_status_count/200': 1,
 'finish_reason': 'finished',
 'finish_time': datetime.datetime(2019, 7, 11, 9, 16, 43, 19215),
 'log_count/DEBUG': 1,
 'log_count/INFO': 9,
 'response_received_count': 1,
 'scheduler/dequeued': 1,
 'scheduler/dequeued/memory': 1,
 'scheduler/enqueued': 1,
 'scheduler/enqueued/memory': 1,
 'start_time': datetime.datetime(2019, 7, 11, 9, 16, 42, 814189)}
2019-07-11 17:16:43 [scrapy.core.engine] INFO: Spider closed (finished)
[Finished in 2.6s]

每次查看print打印的时候非常的不方便

其实scrapy不仅可以设置快捷运行，而且还可以在scrapy里是可以设置日志级别的

在settings.py里添加

LOG_LEVEL = "WARNING"

就可以把低于warning的日志全部屏蔽不显示。