Python LinkedList垃圾收集器

Question

我的问题是，一旦我们到达 remove（）函数的末尾，对象 Node（3）是否仍会在RAM内存中？如果不是，什么时候从RAM存储器中删除它？

class Node:
    def __init__(self, data):
        self.data = data
        self.next = None

class LinkedList:
    def __init__(self):
        self.head = None

    def add(self, data):
        if self.head is None:
            self.head = Node(data)
        else:
            curr_node = self.head
            while (curr_node.next):
                curr_node = curr_node.next
            curr_node.next = Node(data)

    def remove(self, data):
        if self.head is not None:
            if self.head.data == data:
                self.head = self.head.next
            else:
                curr_node = self.head
                while curr_node.next is not None:
                    if curr_node.next.data == data:
                        curr_node.next = curr_node.next.next
                        break
                    curr_node = curr_node.next

l = LinkedList()
l.add(2)
l.add(3)
l.add(4)
l.remove(3)

# program going on ...