Method insert

recipes/Python/440673_Safe_heap_queue_class/recipe-440673.py:116–119

(self, pos, item)

    append = push

    def insert(self, pos, item):
        # ignore the position since it's not certain that it can preserve the
        # heap invariant
        self.push(item)

    def extend(self, other):
        if self._key is not None: