code: pyhg

ref: 0e6e44b06400e320145eb5115edce054cfd26d1f
dir: /sys/src/cmd/python/Demo/xml/elem_count.py/

import sys

from xml.sax import make_parser, handler

class FancyCounter(handler.ContentHandler):

    def __init__(self):
        self._elems = 0
        self._attrs = 0
        self._elem_types = {}
        self._attr_types = {}

    def startElement(self, name, attrs):
        self._elems = self._elems + 1
        self._attrs = self._attrs + len(attrs)
        self._elem_types[name] = self._elem_types.get(name, 0) + 1

        for name in attrs.keys():
            self._attr_types[name] = self._attr_types.get(name, 0) + 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


parser = make_parser()
parser.setContentHandler(FancyCounter())
parser.parse(sys.argv[1])