如何将CRUD的数据保存到json文件(python)

import json

# 初始化数据
data = {
    "users": [
        {"id": 1, "name": "Alice", "email": "alice@example.com"},
        {"id": 2, "name": "Bob", "email": "bob@example.com"}
    ]
}

def save_to_json(data, filename="data.json"):
    with open(filename, 'w') as file:
        json.dump(data, file, indent=4)

def load_from_json(filename="data.json"):
    with open(filename, 'r') as file:
        return json.load(file)

def create_user(user):
    data["users"].append(user)
    save_to_json(data)

def read_user(user_id):
    for user in data["users"]:
        if user["id"] == user_id:
            return user
    return None

def update_user(user_id, new_data):
    for user in data["users"]:
        if user["id"] == user_id:
            user.update(new_data)
            save_to_json(data)
            return True
    return False

def delete_user(user_id):
    global data
    data["users"] = [user for user in data["users"] if user["id"] != user_id]
    save_to_json(data)

# 示例操作
if __name__ == "__main__":
    # 创建用户
    create_user({"id": 3, "name": "Charlie", "email": "charlie@example.com"})
    
    # 读取用户
    user = read_user(3)
    print("Read User:", user)
    
    # 更新用户
    update_user(3, {"email": "charlie_new@example.com"})
    user = read_user(3)
    print("Updated User:", user)
    
    # 删除用户
    delete_user(3)
    user = read_user(3)
    print("Deleted User:", user)