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2012-06-26T11:17:41.683
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Thanks all very much for your suggestions and help. I tied it all together into the following two Regex Patterns: This one parses the CSS selector string (e.g. div#myid.myclass[attr=1,fred=3]) <a href="http://www.rubular.com/r/2L0N5iWPEJ" rel="nofollow">http://www.rubular.com/r/2L0N5iWPEJ</a> <pre><code>cssSelector = re.compile(r'^(?P<type>[\*|\w|\-]+)?(?P<id>#[\w|\-]+)?(?P<classes>\.[\w|\-|\.]+)*(?P<data>\[.+\])*$') >>> cssSelector.match("table#john.test.test2[hello]").groups() ('table', '#john', '.test.test2', '[hello]') >>> cssSelector.match("table").groups() ('table', None, None, None) >>> cssSelector.match("table#john").groups() ('table', '#john', None, None) >>> cssSelector.match("table.test.test2[hello]").groups() ('table', None, '.test.test2', '[hello]') >>> cssSelector.match("table#john.test.test2").groups() ('table', '#john', '.test.test2', None) >>> cssSelector.match("*#john.test.test2[hello]").groups() ('*', '#john', '.test.test2', '[hello]') >>> cssSelector.match("*").groups() ('*', None, None, None) </code></pre> And this one does the attributes (e.g. [link,key~=value]) <a href="http://www.rubular.com/r/2L0N5iWPEJ" rel="nofollow">http://www.rubular.com/r/2L0N5iWPEJ</a>: <pre><code>attribSelector = re.compile(r'(?P<word>\w+)\s*(?P<operator>[^\w\,]{0,2})\s*(?P<value>\w+)?\s*[\,|\]]') >>> a = attribSelector.findall("[link, ds9 != test, bsdfsdf]") >>> for x in a: print x ('link', '', '') ('ds9', '!=', 'test') ('bsdfsdf', '', '') </code></pre> A couple of things to note: 1) This parses attributes using comma delimitation (since I am not using strict CSS). 2) This requires patterns take the format: tag, id, classes, attributes The first regex does tokens, so the whitespace and '>' separated parts of a selector string. This is because I wanted to use it to check against my own object graph :) Thanks again!
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