Question

是否可以在Scrapy上运行PyPy？我已经浏览了文档和github项目，但唯一提到PyPy的地方是2年前在PyPy上执行了一些单元测试，请参阅{{3} }。 3年前还有PyPy support长期讨论没有具体解决方案或后续行动。

根据我的理解，主要的Scrapy依赖Twisted是Scrapy fails in PyPy。 Scrapy还使用lxml进行HTML解析，其中known to work on PyPy。完全支持另一个依赖项PyPy-friendly fork（感谢@ Glyph＆＃39的评论）。

Answer 1

Yes. :-)

In a bit more detail, I already had a version of pypy 2.6.0 (with pip) installed on my box. Simply running pip install scrapy nearly just worked for me. Turns out I needed some extra libraries for lxml. After that it was fine.

Once installed, I could run the dmoz tutorial. For example:

[user@localhost scrapy_proj]# scrapy crawl dmoz
2015-06-30 14:34:45 [scrapy] INFO: Scrapy 1.0.0 started (bot: scrapy_proj)
2015-06-30 14:34:45 [scrapy] INFO: Optional features available: ssl, http11
2015-06-30 14:34:45 [scrapy] INFO: Overridden settings: {'BOT_NAME': 'scrapy_proj', 'NEWSPIDER_MODULE': 'scrapy_proj.spiders', 'SPIDER_MODULES': ['scrapy_proj.spiders']}
2015-06-30 14:34:45 [py.warnings] WARNING: :0: UserWarning: You do not have a working installation of the service_identity module: 'No module named service_identity'.  Please install it from <https://pypi.python.org/pypi/service_identity> and make sure all of its dependencies are satisfied.  Without the service_identity module and a recent enough pyOpenSSL to support it, Twisted can perform only rudimentary TLS client hostname verification.  Many valid certificate/hostname mappings may be rejected.

2015-06-30 14:34:45 [scrapy] INFO: Enabled extensions: CoreStats, TelnetConsole, CloseSpider, LogStats, SpiderState
2015-06-30 14:34:45 [scrapy] INFO: Enabled downloader middlewares: HttpAuthMiddleware, DownloadTimeoutMiddleware, UserAgentMiddleware, RetryMiddleware, DefaultHeadersMiddleware, MetaRefreshMiddleware, HttpCompressionMiddleware, RedirectMiddleware, CookiesMiddleware, ChunkedTransferMiddleware, DownloaderStats
2015-06-30 14:34:45 [scrapy] INFO: Enabled spider middlewares: HttpErrorMiddleware, OffsiteMiddleware, RefererMiddleware, UrlLengthMiddleware, DepthMiddleware
2015-06-30 14:34:45 [scrapy] INFO: Enabled item pipelines: 
2015-06-30 14:34:45 [scrapy] INFO: Spider opened
2015-06-30 14:34:45 [scrapy] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2015-06-30 14:34:45 [scrapy] DEBUG: Telnet console listening on 127.0.0.1:6023
2015-06-30 14:34:46 [scrapy] DEBUG: Crawled (200) <GET http://www.dmoz.org/Computers/Programming/Languages/Python/Resources/> (referer: None)
2015-06-30 14:34:46 [scrapy] DEBUG: Crawled (200) <GET http://www.dmoz.org/Computers/Programming/Languages/Python/Books/> (referer: None)
2015-06-30 14:34:46 [scrapy] INFO: Closing spider (finished)
2015-06-30 14:34:46 [scrapy] INFO: Dumping Scrapy stats:
{'downloader/request_bytes': 514,
 'downloader/request_count': 2,
 'downloader/request_method_count/GET': 2,
 'downloader/response_bytes': 16286,
 'downloader/response_count': 2,
 'downloader/response_status_count/200': 2,
 'finish_reason': 'finished',
 'finish_time': datetime.datetime(2015, 6, 30, 13, 34, 46, 219002),
 'log_count/DEBUG': 3,
 'log_count/INFO': 7,
 'log_count/WARNING': 1,
 'response_received_count': 2,
 'scheduler/dequeued': 2,
 'scheduler/dequeued/memory': 2,
 'scheduler/enqueued': 2,
 'scheduler/enqueued/memory': 2,
 'start_time': datetime.datetime(2015, 6, 30, 13, 34, 45, 652421)}
2015-06-30 14:34:46 [scrapy] INFO: Spider closed (finished)

And as requested, here's some more info on the version I'm running:

[user@localhost scrapy_proj]# which scrapy
/opt/pypy/bin/scrapy
[user@localhost scrapy_proj]# scrapy version
2015-06-30 15:04:42 [scrapy] INFO: Scrapy 1.0.0 started (bot: scrapy_proj)
2015-06-30 15:04:42 [scrapy] INFO: Optional features available: ssl, http11
2015-06-30 15:04:42 [scrapy] INFO: Overridden settings: {'BOT_NAME': 'scrapy_proj', 'NEWSPIDER_MODULE': 'scrapy_proj.spiders', 'SPIDER_MODULES': ['scrapy_proj.spiders']}
Scrapy 1.0.0

在PyPy上运行Scrapy

1 个答案: