Changes between Initial Version and Version 1 of GenshiRecipes/FilterHTMLUsingRegex

Timestamp:

Sep 14, 2010, 4:24:21 PM (13 years ago)

Author:

anatoly techtonik <techtonik@…>

Comment:

how to filter HTML with regular expression

GenshiRecipes/FilterHTMLUsingRegex

@@ +1 @@
+Genshi 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.
+
+{{{
+#!python
+from genshi.input import HTML
+from genshi.filters.transform import Transformer, StreamBuffer
+import re
+
+html2 = HTML('''
+<table> 
+ <tr><th></th><td></td><td></td></tr> 
+ <tr><th>not empty</th><td></td><td></td></tr> 
+</table>
+''')
+
+buffer = StreamBuffer()
+
+def rowfilter(): # attention, closure
+  text = buffer.render()
+  text = re.sub(r'(?s)<tr>(\s*<t[hd](/>|>\s*</t[hd]>))+\s*</tr>', '', text)
+  #print(text)
+  return HTML(text)
+
+transtream = html2 | Transformer().select('.')\
+          .copy(buffer).replace(rowfilter)
+print transtream
+}}}