[Tutor] how to extract text by specifying an element using ElementTree

[ps python]

 Kent and Dany, 
Thanks for your replies.  

Here fromstring() assuming that the input is in a kind
of text format. 

what should be the case when I am reading files
directly. 

I am using the following :

from elementtree.ElementTree import ElementTree
mydata = ElementTree(file='00001.xml')
iter = root.getiterator()

Here the whole XML document is loaded as element tree
and how should this iter into a format where I can
apply findall() method. 

thanks
mdan



--- Kent Johnson <kent37 at tds.net> wrote:

> ps python wrote:
> > Hi, 
> > 
> > using ElementTree, how can I extract text of a
> > particular element, or a child node. 
> > 
> > For example:
> > 
> > <biological_processess>
> >    <biological_process>
> >            Signal transduction
> >    </biological_process>
> >    <biological_process>
> >            Energy process
> >     </biological_process>
> > </biological_processess>
> > 
> > In the case where I already know which element
> tags
> > have the information that I need, in such case how
> do
> > i get that specific text. 
> 
> Use find() to get the nodes of interest. The text
> attribute of the node 
> contains the text. For example:
> 
> data = '''<biological_processess>
>     <biological_process>
>             Signal transduction
>     </biological_process>
>     <biological_process>
>             Energy process
>      </biological_process>
> </biological_processess>
> '''
> 
> from elementtree import ElementTree
> 
> tree = ElementTree.fromstring(data)
> 
> for process in tree.findall('biological_process'):
>    print process.text.strip()
> 
> 
> prints
> Signal transduction
> Energy process
> 
> You will have to modify the path in the findall to
> match your actual 
> data, assuming what you have shown is just a
> snippet.
> 
> I stripped whitespace from the text because
> otherwise it includes the 
> newlines and indents exactly as in the original.
> 
> Kent
> 
> _______________________________________________
> Tutor maillist  -  Tutor at python.org
> http://mail.python.org/mailman/listinfo/tutor
> 



		
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