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"""
A simple demo that reads in an XML document and displays the number of
elements and attributes as well as a tally of elements and attributes by name.
"""
import sys
from collections import defaultdict
from xml.sax import make_parser, handler
class FancyCounter(handler.ContentHandler):
def __init__(self):
self._elems = 0
self._attrs = 0
self._elem_types = defaultdict(int)
self._attr_types = defaultdict(int)
def startElement(self, name, attrs):
self._elems += 1
self._attrs += len(attrs)
self._elem_types[name] += 1
for name in attrs.keys():
self._attr_types[name] += 1
def endDocument(self):
print "There were", self._elems, "elements."
print "There were", self._attrs, "attributes."
print "---ELEMENT TYPES"
for pair in self._elem_types.items():
print "%20s %d" % pair
print "---ATTRIBUTE TYPES"
for pair in self._attr_types.items():
print "%20s %d" % pair
if __name__ == '__main__':
parser = make_parser()
parser.setContentHandler(FancyCounter())
parser.parse(sys.argv[1])