如何从字典内的嵌套列表中删除无关方括号？

def remove_brackets(dictionary):
    for key, value in dictionary.items():
        if isinstance(value, list):
            dictionary[key] = remove_brackets_from_list(value)
    return dictionary

def remove_brackets_from_list(lst):
    result = []
    for item in lst:
        if isinstance(item, list):
            result.append(remove_brackets_from_list(item))
        else:
            result.append(item)
    return result

# 示例字典
dictionary = {
    'key1': [1, 2, [3, 4, [5, 6]], 7],
    'key2': [[8, 9], 10, [11, [12, 13, [14]]]],
    'key3': [15, [16, [17, [18, 19]]]],
}

# 删除无关方括号
result = remove_brackets(dictionary)
print(result)

{
    'key1': [1, 2, 3, 4, 5, 6, 7],
    'key2': [8, 9, 10, 11, 12, 13, 14],
    'key3': [15, 16, 17, 18, 19]
}