On Apr 29, 10:12 pm, Stefan Behnel <stefan...@behnel.de> wrote: > dmtr, 30.04.2010 04:57: > > > > > I'm referring to xmlns/URI prefixes. Here's a code example: > > from xml.etree.cElementTree import iterparse > > from cStringIO import StringIO > > xml = """<root xmlns="http://www.very_long_url.com";><child/></ > > root>""" > > for event, elem in iterparse(StringIO(xml)): print event, elem > > > The output is: > > end<Element '{http://www.very_long_url.com}child' at 0xb7ddfa58> > > end<Element '{http://www.very_long_url.com}root' at 0xb7ddfa40> > > > I don't want these "{http://www.very_long_url.com}"; in front of my > > tags. > > > They create performance disaster on large files > > I seriously doubt that they do.
I don't know what kind of XML files you deal with, but for me a large XML file is gigabyte-sized (obviously I don't use Element Tree for those). Even for files tens-of-megabyte files string ops to expand tags with namespaces is going to be a pretty decent penalty--remember ElementTree does nothing lazily. > > (first cElementTree > > adds them, then I have to remove them in python). > > I think that's your main mistake: don't remove them. Instead, use the fully > qualified names when comparing. Unless you have multiple namespaces or are working with defined schema or something, it's useless boilerplate. It'd be a nice feature if ElementTree could let users optionally ignore a namespace, unfortunately it doesn't have it. Carl Banks -- http://mail.python.org/mailman/listinfo/python-list
