Python - linked list

Why is it only printing 6 and 7? I need to print all the values. I believe there is some issue with get() as self.head is being updated somewhere? If so, how can I declare self.head here as the beginning so that it prints all the elements. Thanks in advance.

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

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

    def prepend(self,data):
        n = Node(data)
        if self.head is None:
            self.head = n
        else:
            n.next = self.head
            self.head = n

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

    def get(self):
        while self.head:
            print(self.head.data)
            self.head = self.head.next

la = list()
la.prepend(1)
la.append(4)
la.append(5)
la.append(6)
la.append(7)
la.get()

source https://stackoverflow.com/questions/73674604/python-linked-list