def errback(self, failure):
        """
        Errbacks the deferreds previously produced by this object.

        @param failure: The object which will be passed to the
        C{errback} method of all C{Deferred}s previously produced by
        this object's C{tee} method.
        @raise AlreadyCalledError: If L{callback} or L{errback} has
        already been called on this object.
        """
        self._setResult(failure)
        self._isFailure = True

        for d in self._deferreds:
            d.errback(failure)
def errback ( self , failure ) : self . _setResult ( failure ) self . _isFailure = True for d in self . _deferreds : d . errback ( failure )
Errbacks the deferreds previously produced by this object.

        @param failure: The object which will be passed to the
        C{errback} method of all C{Deferred}s previously produced by
        this object's C{tee} method.
        @raise AlreadyCalledError: If L{callback} or L{errback} has
        already been called on this object.