from __future__ import with_statement
from threading import Lock, RLock

def func_pass():
	lock = Lock()
	with lock:
		pass
	return lock

def func_except():
	lock = Lock()
	try:
		with lock:
			raise Exception("Hello World")
	finally:
		return lock

def func_return():
	lock = Lock()
	with lock:
		return lock


print "func_pass lock still held  : %s" % func_pass()._is_owned()
print "func_except lock still held: %s" % func_except()._is_owned()
print "func_return lock still held: %s" % func_return()._is_owned()