用虚拟环境下的python安装的nacos-sdk-python，复制到其他机器上面会报ModuleNotFoundError: No module named 'httplib'

背景：
交付类项目，自动安装nacos时，需要在客户机器上调用nacos的api进行输入导入等操作，因此自制了python venv。
python版本：3.6.15和3.9.7都测试过

现象：
在制作venv的机器上安装了nacos-sdk-python，在虚拟环境下使用python -c 'import nacos'能正常，但是到其他机器上venv下import nacos会报错

(venv) [root@localhost ~]# python -c 'import nacos'
Traceback (most recent call last):
File "/root/venv/lib/python3.9/site-packages/nacos/client.py", line 29, in
from urllib.request import Request, urlopen, ProxyHandler, HTTPSHandler, build_opener
ImportError: cannot import name 'HTTPSHandler' from 'urllib.request' (/root/venv/python3/lib/python3.9/urllib/request.py)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "", line 1, in
File "/root/venv/lib/python3.9/site-packages/nacos/init.py", line 1, in
from .client import NacosClient, NacosException, DEFAULTS, DEFAULT_GROUP_NAME
File "/root/venv/lib/python3.9/site-packages/nacos/client.py", line 34, in
import httplib as HTTPStatus
ModuleNotFoundError: No module named 'httplib'

排查：
通过追踪发现客户机器python3（venv虚拟环境）下urllib.request无HTTPSHandler模块，而nacos-sdk-python引入HTTPSHandler前未判断是否存在该方法，导致client.py的34行代码抛出异常（实际是29行try失败）

说明：
我用venv同时安装了ansible和nacos-sdk-python，且ansible也使用了HTTPSHandler，但ansible有一段判断代码，请问下是否nacos sdk是否也能先判断下HTTPSHandler是否存在再使用HTTPSHandler呢？

ansible代码片段：

vim /root/venv/lib/python3.9/site-packages/ansible/module_utils/urls.py

...
try:
# python3
import urllib.request as urllib_request
from urllib.request import AbstractHTTPHandler
except ImportError:
# python2
import urllib2 as urllib_request
from urllib2 import AbstractHTTPHandler
....

if hasattr(httplib, 'HTTPSConnection') and hasattr(urllib_request, 'HTTPSHandler'):
...

临时解决：
#client.py 第29和715行，删除HTTPSHandler
(venv) [root@localhost python3]# cat /root/venv/lib/python3.9/site-packages/nacos/client.py -n
...
26 try:
27 # python3.6
28 from http import HTTPStatus
29 from urllib.request import Request, urlopen, ProxyHandler, build_opener
...
715 #https_support = HTTPSHandler(context=ctx)
...

Start with nacos/client.py around lines 26-34 and inspect the HTTPSHandler use near line 715. Reproduce the import failure in the reported Python 3.6 or 3.9 virtual-environment setup, then verify the client handles environments without HTTPSHandler while preserving the existing Python compatibility behavior.