#!/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" encoding="iso-8859-1"?><schema xmlns = "http://www.w3.org/2001/XMLSchema">	<element name = "Customer">		<complexType>			<sequence>				<element name = "FirstName" type = "string" />				<element name = "MiddleInitial" type = "string" />				<element name = "LastName" type = "string" />			</sequence>			<attribute name = "customerID" type = "integer" />		</complexType>	</element></schema>""" valid="""<?xml version="1.0" encoding="iso-8859-1"?><Customer customerID = "24332">	<FirstName>Raymond</FirstName>	<MiddleInitial>G</MiddleInitial>	<LastName>Bayliss</LastName></Customer>	""" invalid="""<?xml version="1.0" encoding="iso-8859-1"?><Customer customerID = "24332">	<MiddleInitial>G</MiddleInitial>	<LastName>Bayliss</LastName></Customer>	""" e = ErrorHandler()ctxt_parser = libxml2.schemaNewMemParserCtxt(schema, len(schema))ctxt_schema = ctxt_parser.schemaParse()ctxt_valid  = ctxt_schema.schemaNewValidCtxt()ctxt_valid.setValidityErrorHandler(e.handler, e.handler, ARG) # Test valid documentdoc = libxml2.parseDoc(valid)ret = doc.schemaValidateDoc(ctxt_valid)if ret != 0 or e.errors:    print "error doing schema validation"    sys.exit(1)doc.freeDoc() # Test invalid documentdoc = libxml2.parseDoc(invalid)ret = doc.schemaValidateDoc(ctxt_valid)if ret == 0 or not e.errors:    print "Error: document supposer to be schema invalid"    sys.exit(1)doc.freeDoc() del ctxt_parserdel ctxt_schemadel ctxt_validlibxml2.schemaCleanupTypes() # Memory debug specificlibxml2.cleanupParser()if libxml2.debugMemory(1) == 0:    print "OK"else:    print "Memory leak %d bytes" % (libxml2.debugMemory(1))    libxml2.dumpMemory()