How to use a python context manager inside a generator

Question

In python, should with-statements be used inside a generator? To be clear, I am not asking about using a decorator to create a context manager from a generator function. I am as

Answer 1

class CManager(object):
    def __enter__(self):
          print "  __enter__"
          return self
    def __exit__(self, exctype, value, tb):
        print "  __exit__; excptype: '%s'; value: '%s'" % (exctype, value)
        if exctype is None:
            return

        # only re-raise if it's *not* the exception that was
        # passed to throw(), because __exit__() must not raise
        # an exception unless __exit__() itself failed.  But throw()
        # has to raise the exception to signal propagation, so this
        # fixes the impedance mismatch between the throw() protocol
        # and the __exit__() protocol.
        #
        if sys.exc_info()[1] is not (value or exctype()):
            raise