如何突破嵌套循环

Question

尝试编写脚本以使用NetBox中的数据对网络设备进行一些自动配置。 我希望用户能够输入站点列表，并让脚本检查那些站点是否有效。代码是这样的：

while True:
    sites = [str(x) for x in input("Which site(s) need to be configured: ").split(', ')]
    for site in sites:
        if not nb.dcim.sites.filter(name=sites):
            print(f"{site} not a valid site")
            continue
        else:
            print(f"{site} is valid")
            break

运行它时，如果站点无效，则代码会正确循环。但是，当输入有效站点时，它仍会循环。见下面的输出

» python sites.py
Which site(s) need to be configured: x
x not a valid site
Which site(s) need to be configured: x
x not a valid site
Which site(s) need to be configured: x
x not a valid site
Which site(s) need to be configured: SITE1
SITE1 is valid
Which site(s) need to be configured: SITE1
SITE1 is valid

我认为while True可能还需要其他吗？ 或break无法正常工作