human
Complete the below
def assertWrapperExceptionTypes(self, deferred, mainType, reasonTypes):

    ''''Assert that the given L{Deferred} fails with the exception given by
    C{mainType} and that the exceptions wrapped by the instance of C{mainType}
    it fails with match the list of exception types given by C{reasonTypes}.
    This is a helper for testing failures of exceptions which subclass
    L{_newclient._WrapperException}.
    @param self: A L{TestCase} instance which will be used to make the
    assertions.
    @param deferred: The L{Deferred} which is expected to fail with
    C{mainType}.
    @param mainType: A L{_newclient._WrapperException} subclass which will be
    trapped on C{deferred}.
    @param reasonTypes: A sequence of exception types which will be trapped on
    the resulting L{mainType} exception instance\'s C{reasons} sequence.
    @return: A L{Deferred} which fires with the C{mainType} instance
    C{deferred} fails with, or which fails somehow.'
    '''
assistant
#Here is the Python program you requested.
    def cbFailed(err):
        for (reason, type) in zip(err.reasons, reasonTypes):
            reason.trap(type)
        self.assertEqual(len(err.reasons), len(reasonTypes), ('len(%s)    !=    len(%s)' % (err.reasons, reasonTypes)))
        return err
    d = self.assertFailure(deferred, mainType)
    d.addCallback(cbFailed)
    return d