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From: Stefan Behnel on 25 Apr 2010 11:41
Barak, Ron, 25.04.2010 17:06:
> This is my first try at XML with Python, and though I tried to read on the web, I'm unable to traverse a DOM tree, as my top element seems to be DOCUMENT_NODE and I cannot find a way to get to the nodes below it.

You might find the xml.etree.ElementTree package a lot easier to work with.


> $ python -u xml_parse.py
> node:<xml.dom.minidom.DocumentType instance at 0x00DE25A8>
> dom2.nodeType: 9
> dom2.nodeName: #document
> node is DOCUMENT_NODE:<xml.dom.minidom.DocumentType instance at 0x00DE25A8>
> node:<DOM Element: database at 0xde2698>
> dom2.nodeType: 9
> dom2.nodeName: #document
> node is DOCUMENT_NODE:<DOM Element: database at 0xde2698>
> ('dom2._get_childNodes():', [<xml.dom.minidom.DocumentType instance at 0x00DE25A8>,<DOM Element: database at 0xde2698>])
> Traceback (most recent call last):
> File "xml_parse.py", line 26, in<module>
> print("child_nodes._get_childNodes():",child_nodes._get_childNodes())
> AttributeError: 'NodeList' object has no attribute '_get_childNodes'

"childNodes" is a property, use it like

print("child_nodes.childNodes:", child_nodes.childNodes)

By convention, the underscore at the beginning of "_get_childNodes"
indicates that it is not considered a public method.

Stefan

From: Barak, Ron on 26 Apr 2010 09:51
> -----Original Message-----
> From: Stefan Behnel [mailto:stefan_ml(a)behnel.de]
> Sent: Sunday, April 25, 2010 6:42 PM
> To: python-list(a)python.org
> Subject: Re: Need help with basic DOM XML tree traversing
>
> Barak, Ron, 25.04.2010 17:06:
> > This is my first try at XML with Python, and though I tried
> to read on the web, I'm unable to traverse a DOM tree, as my
> top element seems to be DOCUMENT_NODE and I cannot find a way
> to get to the nodes below it.
>
> You might find the xml.etree.ElementTree package a lot easier
> to work with.
>
>
> > $ python -u xml_parse.py
> > node:<xml.dom.minidom.DocumentType instance at 0x00DE25A8>
> > dom2.nodeType: 9
> > dom2.nodeName: #document
> > node is DOCUMENT_NODE:<xml.dom.minidom.DocumentType instance at
> > 0x00DE25A8> node:<DOM Element: database at 0xde2698>
> > dom2.nodeType: 9
> > dom2.nodeName: #document
> > node is DOCUMENT_NODE:<DOM Element: database at 0xde2698>
> > ('dom2._get_childNodes():', [<xml.dom.minidom.DocumentType
> instance at
> > 0x00DE25A8>,<DOM Element: database at 0xde2698>]) Traceback
> (most recent call last):
> > File "xml_parse.py", line 26, in<module>
> >
> >
> print("child_nodes._get_childNodes():",child_nodes._get_childNodes())
> > AttributeError: 'NodeList' object has no attribute '_get_childNodes'
>
> "childNodes" is a property, use it like
>
> print("child_nodes.childNodes:", child_nodes.childNodes)
>
> By convention, the underscore at the beginning of "_get_childNodes"
> indicates that it is not considered a public method.
>
> Stefan
>
>
>

Hi Stefan,
Thanks for the excellent pointer to xml.etree.ElementTree: it sure makes life easier :-)
Bye,
Ron.
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