@@ -5,8 +5,11 @@ class CallableGeneratorContextManager(contextlib.GeneratorContextManager):

 	def __call__(self, *a, **kw):

 		with self as obj:

 			return obj(*a, **kw)

-def contextmanager(func):

-    """@contextmanager decorator.

+try:

+	from contextlib import contextmanager

+except:

+	def contextmanager(func):

+ 	  """@contextmanager decorator.

     Typical usage: