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Changes between Initial Version and Version 1 of GenshiRecipes/FilterHTMLUsingRegex


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Timestamp:
Sep 14, 2010 4:24:21 PM (5 years ago)
Author:
anatoly techtonik <techtonik@…>
Comment:

how to filter HTML with regular expression

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  • GenshiRecipes/FilterHTMLUsingRegex

    v1 v1  
     1Genshi XPath is very limited and doesn't allow to do such things as selecting an empty row in a table. This recipe shows how to select and remove HTML elements using regular expressions in Transformers.
     2
     3{{{
     4#!python
     5from genshi.input import HTML
     6from genshi.filters.transform import Transformer, StreamBuffer
     7import re
     8
     9html2 = HTML('''
     10<table>
     11 <tr><th></th><td></td><td></td></tr>
     12 <tr><th>not empty</th><td></td><td></td></tr>
     13</table>
     14''')
     15
     16buffer = StreamBuffer()
     17
     18def rowfilter(): # attention, closure
     19  text = buffer.render()
     20  text = re.sub(r'(?s)<tr>(\s*<t[hd](/>|>\s*</t[hd]>))+\s*</tr>', '', text)
     21  #print(text)
     22  return HTML(text)
     23
     24transtream = html2 | Transformer().select('.')\
     25          .copy(buffer).replace(rowfilter)
     26print transtream
     27}}}