python获取多层字典的key

可以使用递归函数来获取多层字典的key，例如：

def get_keys(d, keys=[]):
    for k, v in d.items():
        keys.append(k)
        if isinstance(v, dict):
            get_keys(v, keys)
    return keys

使用示例：

d = {
    "key1": {
        "key2": {
            "key3": "value",
            "key4": "value"
        },
        "key5": "value"
    },
    "key6": "value"
}

keys = get_keys(d)
print(keys)

输出结果：

['key1', 'key2', 'key3', 'key4', 'key5', 'key6']