dmoz | 易学教程

How do I convert DMOZ ODP RDF into MySQL?

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问题 I've downloaded DMOZ ODP structure and content archives from rdf.dmoz.org. How can I convert them from RDF it to MySQL? The problem is that ODP RDFs are buggy, and it's imposable to parse them with a strict parser. I found dmoz2mysql, but it crashes after 30 minutes with a very long sql dump, so I'm unable to see the error message. 来源： https://stackoverflow.com/questions/1644675/how-do-i-convert-dmoz-odp-rdf-into-mysql

python爬虫框架scrapy实例详解

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生成项目 scrapy提供一个工具来生成项目，生成的项目中预置了一些文件，用户需要在这些文件中添加自己的代码。打开命令行，执行：scrapy startproject tutorial，生成的项目类似下面的结构 tutorial/ scrapy.cfg tutorial/ __init__.py items.py pipelines.py settings.py spiders/ __init__.py ... scrapy.cfg是项目的配置文件用户自己写的spider要放在spiders目录下面，一个spider类似 1 2 3 4 5 6 7 8 9 10 11 from scrapy.spider import BaseSpider class DmozSpider(BaseSpider): name = "dmoz" allowed_domains = [ "dmoz.org" ] start_urls = [ "http://www.dmoz.org/Computers/Programming/Languages/Python/Books/" , "http://www.dmoz.org/Computers/Programming/Languages/Python/Resources/" ] def parse( self , response): filename

Parsing Huge XML Files in PHP

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问题 I\'m trying to parse the DMOZ content/structures XML files into MySQL, but all existing scripts to do this are very old and don\'t work well. How can I go about opening a large (+1GB) XML file in PHP for parsing? 回答1: There are only two php APIs that are really suited for processing large files. The first is the old expat api, and the second is the newer XMLreader functions. These apis read continuous streams rather than loading the entire tree into memory (which is what simplexml and DOM

Parsing Huge XML Files in PHP

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I'm trying to parse the DMOZ content/structures XML files into MySQL, but all existing scripts to do this are very old and don't work well. How can I go about opening a large (+1GB) XML file in PHP for parsing? There are only two php APIs that are really suited for processing large files. The first is the old expat api, and the second is the newer XMLreader functions. These apis read continuous streams rather than loading the entire tree into memory (which is what simplexml and DOM does). For an example, you might want to look at this partial parser of the DMOZ-catalog: <?php class