域名解析被删了怎么恢复

import dns.resolver
import dns.update
import dns.query
import dns.tsigkeyring

# 假设的域名和DNS服务器信息
domain = 'example.com'
dns_server = 'ns1.example.com'
keyname = 'keyname'
keysecret = 'keysecret'

# 创建一个TSIG密钥环
keyring = dns.tsigkeyring.from_text({keyname: keysecret})

# 查询DNS记录
try:
    answers = dns.resolver.resolve(domain, 'A', raise_on_no_answer=False)
    print(f"Current DNS records for {domain}:")
    for rdata in answers:
        print(f"{rdata.address}")
except dns.resolver.NXDOMAIN:
    print(f"The domain {domain} does not exist.")
except dns.resolver.NoAnswer:
    print(f"The domain {domain} has no A records.")

# 如果需要恢复DNS记录，可以使用dns.update
update = dns.update.Update(domain, keyring=keyring)
update.add(domain, 300, 'A', '192.168.1.1')  # 添加或更新A记录
response = dns.query.tcp(update, dns_server)
if response.rcode() == 0:
    print("DNS record updated successfully.")
else:
    print(f"Failed to update DNS record, rcode: {response.rcode()}")