榜单
服务器优惠
AI论文
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动态添加应用
动态添加应用 定义带动态应用的VirtualEnv 动态添加应用 注意：这并不是托管多个应用的最好的方法。你最好为每个应用运行一个uWSGI实例。 你可以在没有配置应用的情况下启动uWSGI服务器。 要加载一个新的应用，可以使用uwsgi包中的这些变量： UWSGI_SCRIPT – 传递定义了一个 application 可调用对象的... -
第二个小插曲，deferred
更多关于回调的知识 Deferred的优秀架构 Callbacks与Errbacks，成对出现 deferred模拟器 总结 参考 更多关于回调的知识 稍微停下来再思考一下回调的机制。尽管对于以Twisted方式使用Deferred写一个简单的异步程序已经非常了解了，但Deferred提供更多的是只有在比较复杂环境下才会用到的功能。因此，下... -
Settings
Settings Designating the settings Populating the settings 1. Command line options 2. Settings per-spider 3. Project settings module 4. Default settings per-command 5. Default ... -
Frequently Asked Questions
Frequently Asked Questions How does Scrapy compare to BeautifulSoup or lxml? Can I use Scrapy with BeautifulSoup? What Python versions does Scrapy support? Did Scrapy “steal” X ... -
跟多线程搞一些事情
跟多线程搞一些事情 跟多线程搞一些事情 至今我仍然坚信，单线程仍然是最有效率的方式，比如nginx就是个很好的例子，在python中尤其。但是tornado依然提供了多线程方式来给开发者。这里给出一个例子，并做出简单的解释。 EXECUTOR = ThreadPoolExecutor ( max_workers = 4 )＃最大线程数 ... -
通用爬虫(Broad Crawls)
通用爬虫(Broad Crawls) 增加并发 Increase Twisted IO thread pool maximum size Setup your own DNS 降低log级别 禁止cookies 禁止重试 减小下载超时 禁止重定向 启用 “Ajax Crawlable Pages” 爬取 通用爬虫(Broad Cra... -
Libraries and Tools
Tools etcdctl - A command line client for etcd etcd-backup - A powerful command line utility for dumping/restoring etcd - Supports v2 etcd-dump - Command line utility for du... -
Logging
Logging Log levels How to log messages Logging from Spiders Logging configuration Logging settings Command-line options Custom Log Formats Advanced customization scrapy.uti... -
Frequently Asked Questions
Frequently Asked Questions Is PyMongo thread-safe? Is PyMongo fork-safe? How does connection pooling work in PyMongo? Does PyMongo support Python 3? Does PyMongo support asynch... -
Frequently Asked Questions
Frequently Asked Questions Is PyMongo thread-safe? Is PyMongo fork-safe? Can PyMongo help me load the results of my query as a Pandas DataFrame? How does connection pooling work...