gistfile1.txt

  class Logger(object):
      def __enter__(self):
          return self
      def __exit__(self, exc_type, value, traceback):
          print "Logging some stuff"
          if exc_type is not None:
              print "Sending exception up to New Relic"

........

In [16]: def foo():
   ....:     with Logger():
   ....:         yield 1
   ....:         yield 2
   ....:         

In [17]: f = foo()

In [18]: f.next()
Out[18]: 1

In [19]: del f
Logging some stuff
Sending exception up to New Relic