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| Current File : //usr/opt/nge/share/doc/libxml2-python-2.9.12/examples/xpathext.py |
#!/usr/bin/python -u
import sys
import libxml2
# Memory debug specific
libxml2.debugMemory(1)
def foo(ctx, x):
return x + 1
def bar(ctx, x):
return "%d" % (x + 2)
doc = libxml2.parseFile("tst.xml")
ctxt = doc.xpathNewContext()
res = ctxt.xpathEval("//*")
if len(res) != 2:
print("xpath query: wrong node set size")
sys.exit(1)
if res[0].name != "doc" or res[1].name != "foo":
print("xpath query: wrong node set value")
sys.exit(1)
libxml2.registerXPathFunction(ctxt._o, "foo", None, foo)
libxml2.registerXPathFunction(ctxt._o, "bar", None, bar)
i = 10000
while i > 0:
res = ctxt.xpathEval("foo(1)")
if res != 2:
print("xpath extension failure")
sys.exit(1)
i = i - 1
i = 10000
while i > 0:
res = ctxt.xpathEval("bar(1)")
if res != "3":
print("xpath extension failure got %s expecting '3'")
sys.exit(1)
i = i - 1
doc.freeDoc()
ctxt.xpathFreeContext()
# Memory debug specific
libxml2.cleanupParser()
if libxml2.debugMemory(1) == 0:
print("OK")
else:
print("Memory leak %d bytes" % (libxml2.debugMemory(1)))
libxml2.dumpMemory()