Yield tuples of reaction ID and reactions defined in the model

def parse_reactions(self):
        """Yield tuples of reaction ID and reactions defined in the model"""

        # Parse reactions defined in the main model file
        if 'reactions' in self._model:
            for reaction in parse_reaction_list(
                    self._context, self._model['reactions'],
                    self.default_compartment):
                yield reaction