#!/usr/bin/python -u## this test exercise the XPath basic engine, parser, etc, and# allows to detect memory leaks#import sysimport libxml2 instance="""<?xml version="1.0"?><tag xmlns:foo='urn:foo' xmlns:bar='urn:bar' xmlns:baz='urn:baz' />""" def namespaceDefs(node):    n = node.nsDefs()    while n:        yield n        n = n.next def checkNamespaceDefs(node, count):    nsList = list(namespaceDefs(node))    #print nsList    if len(nsList) != count :        raise Exception, "Error: saw %d namespace declarations.  Expected %d" % (len(nsList), count)    # Memory debug specificlibxml2.debugMemory(1) # Remove single namespacedoc = libxml2.parseDoc(instance)node = doc.getRootElement()checkNamespaceDefs(node, 3)ns = node.removeNsDef('urn:bar')checkNamespaceDefs(node, 2)ns.freeNsList()doc.freeDoc() # Remove all namespacesdoc = libxml2.parseDoc(instance)node = doc.getRootElement()checkNamespaceDefs(node, 3)ns = node.removeNsDef(None)checkNamespaceDefs(node, 0)ns.freeNsList()doc.freeDoc() # Remove a namespace refered to by a childdoc = libxml2.newDoc("1.0")root = doc.newChild(None, "root", None)namespace = root.newNs("http://example.com/sample", "s")child = root.newChild(namespace, "child", None)root.removeNsDef("http://example.com/sample")doc.reconciliateNs(root)namespace.freeNsList()doc.serialize() # This should not segfaultdoc.freeDoc() # Memory debug specificlibxml2.cleanupParser()if libxml2.debugMemory(1) == 0:    print "OK"else:    print "Memory leak %d bytes" % (libxml2.debugMemory(1))    libxml2.dumpMemory()