#!/usr/bin/python -uimport libxml2import sys ARG = 'test string' class ErrorHandler:     def __init__(self):        self.errors = []     def handler(self, msg, data):        if data != ARG:            raise Exception, "Error handler did not receive correct argument"        self.errors.append(msg) # Memory debug specificlibxml2.debugMemory(1) schema="""<?xml version="1.0"?><element name="foo"         xmlns="http://relaxng.org/ns/structure/1.0"         xmlns:a="http://relaxng.org/ns/annotation/1.0"         xmlns:ex1="http://www.example.com/n1"         xmlns:ex2="http://www.example.com/n2">  <a:documentation>A foo element.</a:documentation>  <element name="ex1:bar1">    <empty/>  </element>  <element name="ex2:bar2">    <empty/>  </element></element>""" valid="""<?xml version="1.0"?><foo><pre1:bar1 xmlns:pre1="http://www.example.com/n1"/><pre2:bar2 xmlns:pre2="http://www.example.com/n2"/></foo>""" invalid="""<?xml version="1.0"?><foo><pre1:bar1 xmlns:pre1="http://www.example.com/n1">bad</pre1:bar1><pre2:bar2 xmlns:pre2="http://www.example.com/n2"/></foo>""" rngp = libxml2.relaxNGNewMemParserCtxt(schema, len(schema))rngs = rngp.relaxNGParse()ctxt = rngs.relaxNGNewValidCtxt()e = ErrorHandler()ctxt.setValidityErrorHandler(e.handler, e.handler, ARG) # Test valid documentdoc = libxml2.parseDoc(valid)ret = doc.relaxNGValidateDoc(ctxt)if ret != 0 or e.errors:    print "error doing RelaxNG validation"    sys.exit(1)doc.freeDoc() # Test invalid documentdoc = libxml2.parseDoc(invalid)ret = doc.relaxNGValidateDoc(ctxt)if ret == 0 or not e.errors:    print "Error: document supposed to be RelaxNG invalid"    sys.exit(1)doc.freeDoc() del rngpdel rngsdel ctxtlibxml2.relaxNGCleanupTypes() # Memory debug specificlibxml2.cleanupParser()if libxml2.debugMemory(1) == 0:    print "OK"else:    print "Memory leak %d bytes" % (libxml2.debugMemory(1))    libxml2.dumpMemory()