修改后如何保存字典？

import pickle

# 定义字典
my_dict = {'key1': 'value1', 'key2': 'value2'}

# 保存字典到文件
with open('my_dict.pkl', 'wb') as f:
    pickle.dump(my_dict, f)

# 从文件中读取字典
with open('my_dict.pkl', 'rb') as f:
    loaded_dict = pickle.load(f)

print(loaded_dict)

import sqlite3

# 连接数据库
conn = sqlite3.connect('my_db.db')
cursor = conn.cursor()

# 创建表格
cursor.execute('''CREATE TABLE IF NOT EXISTS my_table
                  (key TEXT PRIMARY KEY, value TEXT)''')

# 定义字典
my_dict = {'key1': 'value1', 'key2': 'value2'}

# 将字典数据插入表格
for key, value in my_dict.items():
    cursor.execute("INSERT INTO my_table VALUES (?, ?)", (key, value))

# 提交事务并关闭连接
conn.commit()
conn.close()

# 定义字典
my_dict = {'key1': 'value1', 'key2': 'value2'}

# 将字典赋值给变量
modified_dict = my_dict

# 或者将字典作为函数的返回值
def modify_dict(dict):
    dict['key1'] = 'new_value1'
    return dict

modified_dict = modify_dict(my_dict)