Файл не сохраняет изменения после работы

import pickle
 
addressBook = {'Andrew': '22 street'}
 
 
class Ab:
 
    def save():
        with open('addressBook.pickle', 'wb') as f:
            pickle.dump(addressBook, f)
 
    def load():
        with open('addressBook.pickle', 'rb') as f:
            addressBook_new = pickle.load(f)
            print(addressBook_new)
 
    def add():
        name = input("Введите имя: ")
        address = input("Введите адрес: ")
        addressBook[name] = address
        print("Адрес добавлен")
 
    def delete():
        name = input("Введите имя, данные которого хотите удалить: ")
        del addressBook[name]
        print("Адрес удалён")
 
    def printAb():
        for name, address in addressBook.items():
            print("Адрес {0}: {1}".format(name, address))
 
    def change():
        name = input("Введите имя, чей адрес вы хотите изменить: ")
        address = input("Введите новый адрес: ")
        addressBook[name] = address
 
    def find():
        name = input("Введите имя, чей адрес вы хотите узнать: ")
        print(addressBook[name])
 
 
Ab.load()
Ab.save()
 
 
num = int(input("Что вы хотите сделать?\n 1-Добавить новый адрес.\n 2-Удалить существующий адрес.\n 3-Вывести все "
                "адреса в адресной книге.\n 4-Изменить существующий адрес.\n 5-Найти определённый адрес из книги. "))
 
if num == 1:
    Ab.add()
elif num == 2:
    Ab.delete()
elif num == 3:
    Ab.printAb()
elif num == 4:
    Ab.change()
elif num == 5:
    Ab.find()
else:
    print("Введите 1 из указанных цифр")
 
print(addressBook)
Ab.save()

import pickle
 
addressBook = {'Andrew': '22 street'}
 
class Ab:
 
    def save():
        with open('addressBook.pickle', 'wb') as f:
            pickle.dump(addressBook, f)
 
    def load():
        with open('addressBook.pickle', 'rb') as f:
            addressBook_new = pickle.load(f)
            print(addressBook_new)
 
    def add():
        name = input("Enter the name: ")
        address = input("Enter the address: ")
        addressBook[name] = address
        print("Address added")
        Ab.save()  # call the save method to save the changes to the address book
 
    def delete():
        name = input("Enter the name of the entry you want to delete: ")
        del addressBook[name]
        print("Address deleted")
        Ab.save()  # call the save method to save the changes to the address book
 
    def printAb():
        for name, address in addressBook.items():

from pickle import dump, load, UnpicklingError
from sys import argv
 
class AddressBook:
    def __init__ (self, fname: str = 'ab.pickle'):
        self.__fname = fname
        self.__records = dict()
        if self.load() < 0:
            print('[Info]: Creating a new book \'%s\'...' %(fname))
            self.save()
 
    def save (self):
        with open(self.__fname, 'wb') as f:
            dump(self.__records, f)
 
    def load (self) -> int:
        try:
            with open(self.__fname, 'rb') as f:
                try:
                    self.__records = load(f)
                except (EOFError, ValueError, UnpicklingError):
                    print('[Warn]: \'%s\' is corrupted. Removing it...' \
                        %(self.__fname))
                    from os import remove; remove(self.__fname)
                    return -1
        except FileNotFoundError:
            print('[Warn]: Could not find \'%s\'' %(self.__fname))
            return -2
        print('[Info]: \'%s\' has been opened successfully' %(self.__fname))
        self.dump()
        return 0
 
    def add (self):
        name = input("Name: ")
        addr = input("Address: ")
        self.__records[name] = addr
        print("[Info]: The address has been added successfully")
 
    def delete (self):
        name = input("Name: ")
        if self.__records.get(name) == None:
            print('[Info]: No such name')
            return
        del self.__records[name]
        print("[Info]: The address has been deleted successfully")
 
    def dump (self):
        for name, addr in self.__records.items():
            print('[Info]: \'%s\': \'%s\'' %(name, addr))
 
    def modify (self):
        name = input("Name: ")
        if self.__records.get(name) == None:
            print('[Info]: No such name')
            return
        addr = input("Address: ")
        self.__records[name] = addr
        print('[Info]: The address has been modified successfully')
 
    def find (self):
        name = input("Name: ")
        if self.__records.get(name) == None:
            print('[Info]: No such name')
            return
        print(self.__records[name])
 
if len(argv) - 1 == 1:
    ab = AddressBook(argv[1])
else:
    ab = AddressBook()
 
print('1. Add a new address.')
print('2. Delete an existing address.')
print('3. Print all addresses.')
print('4. Modify an existing address.')
print('5. Find a specific address.')
print('0. Save and exit.')
num = -1
while True:
    print('Action: ', end='')
    try:
        num = int(input())
    except ValueError:
        continue
    if num == 1:
        ab.add()
    elif num == 2:
        ab.delete()
    elif num == 3:
        ab.dump()
    elif num == 4:
        ab.modify()
    elif num == 5:
        ab.find()
    elif num == 0:
        break
    else:
        print('[Info]: Invalid action')
 
ab.dump()
ab.save()