我可以合法地在聚合结构初始化中重用字段吗？

import copy

class MyClass:
    def __init__(self, data):
        self.data = data

# 深拷贝示例
original = MyClass([1, 2, 3])
copy_instance = copy.deepcopy(original)
copy_instance.data.append(4)
print(original.data)  # 输出: [1, 2, 3]
print(copy_instance.data)  # 输出: [1, 2, 3, 4]

import threading

class ThreadSafeClass:
    def __init__(self):
        self.data = []
        self.lock = threading.Lock()

    def add_data(self, value):
        with self.lock:
            self.data.append(value)

# 示例
thread_safe_obj = ThreadSafeClass()

def worker():
    for i in range(1000):
        thread_safe_obj.add_data(i)

threads = [threading.Thread(target=worker) for _ in range(10)]
for thread in threads:
    thread.start()
for thread in threads:
    thread.join()

print(len(thread_safe_obj.data))  # 输出: 10000