scrapy創建一個項目的流程（簡潔）

1. scrapy的安裝

pip install scrapy
如果出錯，安裝相關的依賴包。

2.命令幫助

scrapy

3.創建一個scrapy項目

scrapy startproject tencentSpider

創建的結果如下:

創建的項目tencentSpider的目錄結構：

4.生成一個具體的爬蟲文件

scrapy genspider tencent hr.tencent.com
文件內容沒任何操作操作

生成爬蟲程序之後目錄的變化：
變化位於紅色方框中。即多了一個新創建的爬蟲文件tencent.py

5.運行爬蟲程序

scrapy crawl tencent

運行結果如下:

I:\tencentSpider>scrapy crawl tencent
2019-09-18 22:45:43 [scrapy.utils.log] INFO: Scrapy 1.5.1 started (bot: tencentSpider)
2019-09-18 22:45:43 [scrapy.utils.log] INFO: Versions: lxml 4.2.5.0, libxml2 2.9.5, cssselect 1.0.1,
 parsel 1.2.0, w3lib 1.17.0, Twisted 18.9.0, Python 3.6.2 |Anaconda custom (64-bit)| (default, Jul 2
0 2017, 12:30:02) [MSC v.1900 64 bit (AMD64)], pyOpenSSL 18.0.0 (OpenSSL 1.1.1b  26 Feb 2019), crypt
ography 2.6.1, Platform Windows-7-6.1.7601-SP1
2019-09-18 22:45:43 [scrapy.crawler] INFO: Overridden settings: {'BOT_NAME': 'tencentSpider', 'NEWSP
IDER_MODULE': 'tencentSpider.spiders', 'ROBOTSTXT_OBEY': True, 'SPIDER_MODULES': ['tencentSpider.spi
ders']}
2019-09-18 22:45:44 [scrapy.middleware] INFO: Enabled extensions:
['scrapy.extensions.corestats.CoreStats',
 'scrapy.extensions.telnet.TelnetConsole',
 'scrapy.extensions.logstats.LogStats']
2019-09-18 22:45:45 [scrapy.middleware] INFO: Enabled downloader middlewares:
['scrapy.downloadermiddlewares.robotstxt.RobotsTxtMiddleware',
 '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']
2019-09-18 22:45:45 [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']
2019-09-18 22:45:45 [scrapy.middleware] INFO: Enabled item pipelines:
[]
2019-09-18 22:45:45 [scrapy.core.engine] INFO: Spider opened
2019-09-18 22:45:45 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 i
tems (at 0 items/min)
2019-09-18 22:45:45 [scrapy.extensions.telnet] DEBUG: Telnet console listening on 127.0.0.1:6023
2019-09-18 22:45:46 [scrapy.downloadermiddlewares.redirect] DEBUG: Redirecting (302) to <GET https:/
/hr.tencent.com/robots.txt> from <GET http://hr.tencent.com/robots.txt>
2019-09-18 22:45:46 [scrapy.downloadermiddlewares.redirect] DEBUG: Redirecting (301) to <GET https:/
/careers.tencent.com/robots.txt> from <GET https://hr.tencent.com/robots.txt>
2019-09-18 22:45:46 [scrapy.downloadermiddlewares.redirect] DEBUG: Redirecting (302) to <GET https:/
/careers.tencent.com/404.html> from <GET https://careers.tencent.com/robots.txt>
2019-09-18 22:45:46 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://careers.tencent.com/404.h
tml> (referer: None)
2019-09-18 22:45:46 [scrapy.downloadermiddlewares.redirect] DEBUG: Redirecting (302) to <GET https:/
/hr.tencent.com/> from <GET http://hr.tencent.com/>
2019-09-18 22:45:46 [scrapy.downloadermiddlewares.redirect] DEBUG: Redirecting (301) to <GET https:/
/careers.tencent.com/> from <GET https://hr.tencent.com/>
2019-09-18 22:45:46 [scrapy.downloadermiddlewares.redirect] DEBUG: Redirecting (302) to <GET https:/
/careers.tencent.com/404.html> from <GET https://careers.tencent.com/robots.txt>
2019-09-18 22:45:46 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://careers.tencent.com/404.h
tml> (referer: None)
2019-09-18 22:45:46 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://careers.tencent.com/> (re
ferer: None)
2019-09-18 22:45:46 [scrapy.core.engine] INFO: Closing spider (finished)
2019-09-18 22:45:46 [scrapy.statscollectors] INFO: Dumping Scrapy stats:
{'downloader/request_bytes': 2025,
 'downloader/request_count': 9,
 'downloader/request_method_count/GET': 9,
 'downloader/response_bytes': 5232,
 'downloader/response_count': 9,
 'downloader/response_status_count/200': 3,
 'downloader/response_status_count/301': 2,
 'downloader/response_status_count/302': 4,
 'finish_reason': 'finished',
 'finish_time': datetime.datetime(2019, 9, 18, 14, 45, 46, 906694),
 'log_count/DEBUG': 10,
 'log_count/INFO': 7,
 'response_received_count': 3,
 'scheduler/dequeued': 3,
 'scheduler/dequeued/memory': 3,
 'scheduler/enqueued': 3,
 'scheduler/enqueued/memory': 3,
 'start_time': datetime.datetime(2019, 9, 18, 14, 45, 45, 733627)}
2019-09-18 22:45:46 [scrapy.core.engine] INFO: Spider closed (finished)