有没有一种很好的方法来返回None而不是基于字符串的对象

def my_function():
    # do something
    return None

def my_function():
    # do something
    pass

def my_function():
    # do something
    return []

def my_function():
    # do something
    return {}

def my_function():
    # do something
    return set()

def my_function():
    # do something
    return -1  # 或者其他特殊值

def my_function():
    # do something
    return False  # 或者其他特殊值

def my_function():
    # do something
    return None  # 或者其他特殊值