问题描述
是否可以在PyPy上运行Scrapy?我浏览了文档和github项目，但提到PyPy的唯一地方是2年前在PyPy上执行了一些单元测试，请参见 PyPy支持.还有 Spy无法在PyPy中失败长时间的讨论发生了3年前没有具体的决议或后续行动.
Is it possible to run Scrapy on PyPy? I've looked through the documentation and the github project, but the only place where PyPy is mentioned is that there were some unit tests being executed on PyPy 2 years ago, see PyPy support. There is also Scrapy fails in PyPy long discussion happened 3 years ago without a concrete resolution or a follow-up.
据我了解，主要的Scrapy依赖项Twisted是已知可用于PyPy . Scrapy还使用lxml进行HTML解析，该解析具有 PyPy友好的fork .完全支持其他依赖项 pyOpenSSL (感谢@Glyph的评论)
From what I understand, the main Scrapy's dependency Twisted is known to work on PyPy. Scrapy also uses lxml for HTML parsing, which has a PyPy-friendly fork. The other dependency, pyOpenSSL is fully supported (thanks to @Glyph's comment).
推荐答案
是. :-)
更详细一点，我已经在盒子上安装了pypy 2.6.0(带有pip)版本.只需运行pip install scrapy 就对我有用了.原来，我需要为lxml 一些额外的库.之后就没事了.
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.
安装后，我可以运行 dmoz教程.例如:
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)
根据要求，以下是我正在运行的版本的更多信息:
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
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