[Tutor] Writing to XML file with minidom
kent37 at tds.net
Tue Aug 30 13:40:02 CEST 2005
Johan Geldenhuys wrote:
> Thanks for he help, so far.
> I am still having some questions on writing my new string back to the
> xml file after I found what I was looking for and changed it.
> xmlDocument = minidom.parse(file_name) # open existing file for parsing
> main = xmlDocument.getElementsByTagName('Config')
> configSection = mainSection
> for node in configSection: #Here I get the NamedNodeMap info
> password = node.getAttribute("password")
> # Do stuff to the password and I have 'newPass'
> node.removeAttribute('password') # I take out my old attribute
> and it's value
> node.setAttribute('password', newPass)
> At this stage I have my new attribute and it's new value, but how do I
> write that to my file in the same place?
> I have to get a 'writer', how do I do this?
The minidom docs say that DOM objects have a writexml() method:
Write XML to the writer object. The writer should have a write() method which matches that of the file object interface.
This is saying that 'writer' should act like a file object. So it can just be a file object obtained by calling open(). In other words something like
f = open(file_name, 'w')
should do it. If you have non-ascii characters in your XML you should use codecs.open() instead of plain open() and encode your XML as desired (probably utf-8).
> Do I have to write all the data back or can I just replace the pieces I
You have to write it all back.
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