Updating XML files...

I'm having trouble with updating XML files...

This code works for reading the values:

def getText(nodelist):
rc = ""
for node in nodelist:
if node.nodeType == node.TEXT_NODE:
rc = rc + node.data
return rc

def luo_kayttajalista(userdom,number):
controlled = userdom.getElementsByTagName('User_controlled')
control = controlled[number]

return getText(control.childNodes)

contr = open(USERDATA,'r')
userdom = xml.dom.minidom.parse(contr)
contr.close()

User0 = capitalize(luo_kayttajalista(userdom, 0))

BUT the question is, how can I change those values...

Thanks for any helps...

Miska