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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def transitions(self, transitions):
 """ Setter for _transitions field See property :param: transitions: Dictionary transitions[transition_id] of :class:`rafcon.core.transition.Transition` :raises exceptions.TypeError: if the transitions parameter has the wrong type :raises exceptions.AttributeError: if the keys of the transitions dictionary and the transition_ids of the transitions in the dictionary do not match """

        if not isinstance(transitions, dict):
            raise TypeError("transitions must be of type dict")
        if [t_id for t_id, transition in transitions.items() if not isinstance(transition, Transition)]:
            raise TypeError("element of transitions must be of type Transition")
        if [t_id for t_id, transition in transitions.items() if not t_id == transition.transition_id]:
            raise AttributeError("The key of the transition dictionary and the id of the transition do not match")

        old_transitions = self._transitions
        self._transitions = transitions
        transition_ids_to_delete = []
        for transition_id, transition in transitions.items():
            try:
                transition.parent = self
            except (ValueError, RecoveryModeException) as e:
                if type(e) is RecoveryModeException:
                    logger.error("Recovery error: {0}\n{1}".format(str(e), str(traceback.format_exc())))
                    if e.do_delete_item:
                        transition_ids_to_delete.append(transition.transition_id)
                else:
                    self._transitions = old_transitions
                    raise

        self._transitions = dict((transition_id, t) for (transition_id, t) in self._transitions.items()
                                 if transition_id not in transition_ids_to_delete)

        # check that all old_transitions are no more referencing self as there parent
        for old_transition in old_transitions.values():
            if old_transition not in self._transitions.values() and old_transition.parent is self:
                old_transition.parent = None