xml parsing escape characters
"Martin v. Löwis"
martin at v.loewis.de
Thu Jan 20 12:44:25 EST 2005
Luis P. Mendes wrote:
> with: DataSetNode = stringNode.childNodes[0]
> print DataSetNode.toxml()
>
> I get:
>
> <DataSet>
> ~ <Order>
> ~ <Customer>439</Customer>
>
> ~ </Order>
> </DataSet>
> _______________________________________________________________-
>
> so far so good, but when I issue the command:
>
> print DataSetNode.childNodes[0]
>
> I get:
> IndexError: tuple index out of range
>
> Why the error, and why does it return a tuple?
The DataSetNode has no children, because it is not
an Element node, but a Text node. In XML, an element
is denoted by
<DataSet>...</DataSet>
and *not* by
<DataSet>...</DataSet>
The latter is just a single string, represented
in XML as a Text node. It does not give you any
hierarchy whatsoever.
As a text node does not have any children, its
childNode members is a empty tuple; accessing
that tuple gives you an IndexError.
Regards,
Martin
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