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I'm trying to parse an xml file with jython (not through java parsers
like xerces).

I tried minidom in jython 2.1 and 2.2a but all failed.

What can I do? The last resort would be using java parsers. Then how
can I use them like python xml parsers? It seems like javadom and
javasax has something to do, but I don't know how.

Jane

(Jane Austine) wrote:

> I'm trying to parse an xml file with jython (not through java parsers
> like xerces).

If all else fails, try pxdom. It's a pure-Python DOM/parser, so it should work
with Jython, but it's not going to be fast. At all.

http://www.doxdesk.com/software/py/pxdom.html

(BTW: new version coming this weekend, to catch up with the changes in the new
DOM 3 CRs.)

--
Andrew Clover
private.php?do=newpm&u=
http://www.doxdesk.com/

[Jane Austine]
> I'm trying to parse an xml file with jython (not through java parsers
> like xerces).
>
> I tried minidom in jython 2.1 and 2.2a but all failed.

It's quite likely that your documents contained namespaces. The only
parser supported in jython is "xmlproc", because it is pure python.
However, "xmlproc" has some significant bugs in relation to namespace
processing, IIRC from the last time I looked at it.

> What can I do?

1. Use a Java SAX2 parser, write a jython ContentHandler for it, build
a Minidom from the events.
2. Use a Java DOM processor (DOM4J, JDOM, etc), and let it build a DOM
for you.

It would probably be easier if you could give an outline of what you
are trying to achieve. For example, do you really need to build an
object model? Do you need to use xpath? Do you need to validate
structures? Etc, etc.

> The last resort would be using java parsers. Then how
> can I use them like python xml parsers? It seems like javadom and
> javasax has something to do, but I don't know how.

If you want to know about using SAX events to build object models,
check this old thread on c.l.py.

http://groups.google.com/groups?hl=e...t%40python.org

If you have any specific questions or face any specific problems, post
some details.

regards,

--
alan kennedy
-----------------------------------------------------
check http headers here: http://xhaus.com/headers
email alan: http://xhaus.com/mailto/alan

Jane Austine wrote:
> I'm trying to parse an xml file with jython (not through java parsers
> like xerces).
>
> I tried minidom in jython 2.1 and 2.2a but all failed.
>
> What can I do? The last resort would be using java parsers. Then how
> can I use them like python xml parsers? It seems like javadom and
> javasax has something to do, but I don't know how.

There is a really goog xml toolkit wich even covers xslt and some other
fancy stuff. Its called 4suite, and you can get it here:

http://www.4suite.org/

One of the authors, Uche Ogbuji, has some tutorials on working with it
on developerworks.

Diez

Alan Kennedy <> wrote in message news:<>...
> [Jane Austine]
> > I'm trying to parse an xml file with jython (not through java parsers
> > like xerces).
> >
> > I tried minidom in jython 2.1 and 2.2a but all failed.
>
> It's quite likely that your documents contained namespaces.

No.

Jython 2.1 on java1.4.2-beta (JIT: null)
Type "copyright", "credits" or "license" for more information.
>>> from xml.dom import minidom
>>> minidom.parseString('<tag>foobar</tag>')
Traceback (innermost last):
File "<console>", line 1, in ?
File "C:\work\jython-2.1\Lib\xml\dom\minidom.py", line 913, in parseString
File "C:\work\jython-2.1\Lib\xml\dom\minidom.py", line 900, in _doparse
File "C:\work\jython-2.1\Lib\xml\dom\pulldom.py", line 251, in getEvent
AttributeError: feed
>>>


> The only
> parser supported in jython is "xmlproc", because it is pure python.

I can't make it work.

>>> import xml.sax,xml.dom.minidom
>>> p=xml.sax.make_parser(["xml.sax.drivers2.drv_xmlproc"])
>>> xml.dom.minidom.parseString('<tag>foobar</tag>',parser=p)
Traceback (innermost last):
File "<console>", line 1, in ?
File "C:\work\jython-2.1\Lib\xml\dom\minidom.py", line 913, in parseString
File "C:\work\jython-2.1\Lib\xml\dom\minidom.py", line 900, in _doparse
File "C:\work\jython-2.1\Lib\xml\dom\pulldom.py", line 251, in getEvent
AttributeError: feed

> However, "xmlproc" has some significant bugs in relation to namespace
> processing, IIRC from the last time I looked at it.
>
> > What can I do?
>
> 1. Use a Java SAX2 parser, write a jython ContentHandler for it, build
> a Minidom from the events.
> 2. Use a Java DOM processor (DOM4J, JDOM, etc), and let it build a DOM
> for you.
>
> It would probably be easier if you could give an outline of what you
> are trying to achieve. For example, do you really need to build an
> object model? Do you need to use xpath? Do you need to validate
> structures? Etc, etc.
>

I need the tree model of the xml document. So I'm trying to use DOM parsers.

> > The last resort would be using java parsers. Then how
> > can I use them like python xml parsers? It seems like javadom and
> > javasax has something to do, but I don't know how.
>
> If you want to know about using SAX events to build object models,
> check this old thread on c.l.py.
>
> http://groups.google.com/groups?hl=e...t%40python.org
>
> If you have any specific questions or face any specific problems, post
> some details.
>
> regards,

[Alan Kennedy]
>> The only
>> parser supported in jython is "xmlproc", because it is pure python.

[Jane Austine]
> I can't make it work.
>
> >>> import xml.sax,xml.dom.minidom
> >>> p=xml.sax.make_parser(["xml.sax.drivers2.drv_xmlproc"])
> >>> xml.dom.minidom.parseString('<tag>foobar</tag>',parser=p)
> Traceback (innermost last):
> File "<console>", line 1, in ?
> File "C:\work\jython-2.1\Lib\xml\dom\minidom.py", line 913, in parseString
> File "C:\work\jython-2.1\Lib\xml\dom\minidom.py", line 900, in _doparse
> File "C:\work\jython-2.1\Lib\xml\dom\pulldom.py", line 251, in getEvent
> AttributeError: feed

Hmm, pity about that. To be honest, I'm not going to try and make it
work. Any time I need XML processing in jython, I use native Java xml
parsers, such as Xerces. I think most jython users work the same way.

[Alan Kennedy]
>> It would probably be easier if you could give an outline of what you
>> are trying to achieve. For example, do you really need to build an
>> object model? Do you need to use xpath? Do you need to validate
>> structures? Etc, etc.

[Jane Austine]
> I need the tree model of the xml document. So I'm trying to use DOM parsers.

I kind of figured that. My focus with the question was "Why do you
need a tree model"? Do you need to data extraction, structure
validation, xpath/xslt, etc?

If this helps, here is a jython snippet that creates a DOM using
Apache Xerces.

#-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

from java.io import StringReader

import org.xml.sax as sax
import org.apache.xerces.parsers.DOMParser as domparser

if __name__ == "__main__":
parser = domparser()
document = """<doc><a href="http://www.python.org"/></doc>"""
parser.reset()
documentIS = sax.InputSource(StringReader(document))
parser.parse(documentIS)
domtree = parser.getDocument()
results = domtree.getElementsByTagName('a')
for ix in range(results.getLength()):
print "Link found: uri=%s" % results.item(ix).getAttribute('href')

#-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

HTH,

--
alan kennedy
-----------------------------------------------------
check http headers here: http://xhaus.com/headers
email alan: http://xhaus.com/mailto/alan

"Diez B. Roggisch" <> wrote in message news:<bpksk3$1nt1ov$>...
> Jane Austine wrote:
> > I'm trying to parse an xml file with jython (not through java parsers
> > like xerces).
> >
> > I tried minidom in jython 2.1 and 2.2a but all failed.
> >
> > What can I do? The last resort would be using java parsers. Then how
> > can I use them like python xml parsers? It seems like javadom and
> > javasax has something to do, but I don't know how.
>
> There is a really goog xml toolkit wich even covers xslt and some other
> fancy stuff. Its called 4suite, and you can get it here:
>
> http://www.4suite.org/
>
> One of the authors, Uche Ogbuji, has some tutorials on working with it
> on developerworks.

Thanks for the plug, but 4Suite has a lot of C code in it and is
probably not an option for use in Java without some porting work.

--
Uche
http://uche.ogbuji.net

(Jane Austine) wrote in message news:< m>...
> I'm trying to parse an xml file with jython (not through java parsers
> like xerces).
>
> I tried minidom in jython 2.1 and 2.2a but all failed.
>
> What can I do? The last resort would be using java parsers. Then how
> can I use them like python xml parsers? It seems like javadom and
> javasax has something to do, but I don't know how.

The Java parsers seem to work quite well with the xml.dom.javadom
package. First, update your CLASSPATH with references to the necessary
..jar files - this can be a frustrating process, but I found that
xercesImpl-2.5.0.jar and xml-apis.jar were a good combination:

export CLASSPATH=.../xercesImpl-2.5.0.jar:.../xml-apis.jar

Then, start jython and try the following:

import xml.dom.javadom
impl = xml.dom.javadom.XercesDomImplementation()
# Use your own filename below!
doc = impl.buildDocumentFile("example.xml")
# Now, try some PyXML-style DOM properties and methods.
doc.childNodes
doc.childNodes[0].getAttribute("some-attr")

I'd seen javadom lurking in PyXML before now, but it's a nice surprise
to see that it works rather well, especially since I've never seen any
evidence of anyone using it (as far as I remember).

Paul

在 2003å¹´11月24日星期一UTC+8下å�ˆ7æ—¶42分31ç§ ’，Paul Boddie写é�“：
> (Jane Austine) wrote in message news:&lt; .com&gt;...
> &gt; I'm trying to parse an xml file with jython (not through java parsers
> &gt; like xerces).
> &gt;
> &gt; I tried minidom in jython 2.1 and 2.2a but all failed.
> &gt;
> &gt; What can I do? The last resort would be using java parsers. Then how
> &gt; can I use them like python xml parsers? It seems like javadom and
> &gt; javasax has something to do, but I don't know how.
>
> The Java parsers seem to work quite well with the xml.dom.javadom
> package. First, update your CLASSPATH with references to the necessary
> .jar files - this can be a frustrating process, but I found that
> xercesImpl-2.5.0.jar and xml-apis.jar were a good combination:
>
> export CLASSPATH=.../xercesImpl-2.5.0.jar:.../xml-apis.jar
>
> Then, start jython and try the following:
>
> import xml.dom.javadom
> impl = xml.dom.javadom.XercesDomImplementation()
> # Use your own filename below!
> doc = impl.buildDocumentFile(&quot;example.xml&quot
> # Now, try some PyXML-style DOM properties and methods.
> doc.childNodes
> doc.childNodes[0].getAttribute(&quot;some-attr&quot
>
> I'd seen javadom lurking in PyXML before now, but it's a nice surprise
> to see that it works rather well, especially since I've never seen any
> evidence of anyone using it (as far as I remember).
>
> Paul

hi,do you know the PyXML whether can be supported by Jython ?
Looking forward to your reply!
Thanks

, 17.07.2012 10:35:
> hi,do you know the PyXML whether can be supported by Jython ?

PyXML is a dead project, don't use it.

You can use ElementTree in Jython, just as in Python.

Stefan