common.py 文件源码

def register(self, type, reduce_func):
        """Attach a reducer function to a given type in the dispatch table."""
        if hasattr(pickle.Pickler, 'dispatch'):
            # Python 2 pickler dispatching is not explicitly customizable.
            # Let us use a closure to workaround this limitation.
            def dispatcher(self, obj):
                reduced = reduce_func(self, obj)
                self.save_reduce(obj=obj, *reduced)
            self.dispatch[type] = dispatcher
        else:
            self.dispatch_table[type] = lambda obj: reduce_func(self, obj)