python这是什么数据类型？

python what data type is this?

我是python的新手，目前正在使用zeroconf库。

当我尝试在网络上注册服务时，我在函数定义中看到了这一点：

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def register_service(self, info, ttl=_DNS_TTL):
"""Registers service information to the network with a default TTL
of 60 seconds. Zeroconf will then respond to requests for
information for that service. The name of the service may be
changed if needed to make it unique on the network."""
self.check_service(info)
self.services[info.name.lower()] = info
if info.type in self.servicetypes:
self.servicetypes[info.type] += 1
else:
self.servicetypes[info.type] = 1
now = current_time_millis()
next_time = now
i = 0
while i < 3:
if now < next_time:
self.wait(next_time - now)
now = current_time_millis()
continue
out = DNSOutgoing(_FLAGS_QR_RESPONSE | _FLAGS_AA)
out.add_answer_at_time(DNSPointer(info.type, _TYPE_PTR,
_CLASS_IN, ttl, info.name), 0)
out.add_answer_at_time(DNSService(info.name, _TYPE_SRV,
_CLASS_IN, ttl, info.priority, info.weight, info.port,
info.server), 0)
out.add_answer_at_time(DNSText(info.name, _TYPE_TXT, _CLASS_IN,
ttl, info.text), 0)
if info.address:
out.add_answer_at_time(DNSAddress(info.server, _TYPE_A,
_CLASS_IN, ttl, info.address), 0)
self.send(out)
i += 1
next_time += _REGISTER_TIME

有人知道info是什么类型吗？

编辑
感谢您提供答案，它是一个ServiceInfo类。除了docstring在搜索时提供此答案的事实。我仍然不清楚：

遇到这种情况时，流程专家python程序员会遵循-在没有文档字符串的情况下，要采取什么步骤查找info的数据类型？
当我们不将类类型指定为register_service的输入参数的一部分时，python解释器如何知道info是ServiceInfo类的？如何知道info.type是有效属性，而又说info.my_property不是？