On Wed, Jan 12, 2005 at 12:09:58AM +0000, Nelson Minar wrote: > Could someone help me get started using XPath or XQuery in Python? I'm > overwhelmed by all the various options and am lacking guidance on what > the simplest way to go is. What library do I need to enable three line > Python programs to extract data with XPath expressions? > > I have this problem a lot with Python and XML. Even with Uche's > excellent yearly roundups I have a hard time finding how to do fancy > things with XML in Python. I think it's a bit like web server > frameworks in Python - too many choices.
my own favorite is libxml2. Something like the following:
#!/usr/bin/env python
import libxml2
import sys
def grep(what, where):
doc = libxml2.parseDoc(where)
for found in doc.xpathEval(what):
found.saveTo(sys.stdout, format=True)
if __name__ == '__main__':
try:
what = sys.argv[1]
except IndexError:
sys.exit("Usage: %s pattern file ..." % sys.argv[0])
else:
for where in sys.argv[2:]:
grep(what, file(where).read())
although you might want to be smarter with the errors...
--
John Lenton ([EMAIL PROTECTED]) -- Random fortune:
The whole world is a scab. The point is to pick it constructively.
-- Peter Beard
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