import requests
import urllib
url = "https://www.arcgis.com/sharing/rest?f=json"
proxies = urllib.request.getproxies()

session = requests.Session()
session.proxies = proxies
session.trust_env = True
session.verify = False
resp = session.get(url=url)
print(resp.json())

{'currentVersion': '9.2'}

Traceback (most recent call last):
  Python Shell, prompt 2, line 10
  File "C:\Program Files\ArcGIS\Pro\bin\Python\envs\arcgispro-dev\Lib\site-packages\requests\sessions.py", line 555, in get
    return self.request('GET', url, **kwargs)
  File "C:\Program Files\ArcGIS\Pro\bin\Python\envs\arcgispro-dev\Lib\site-packages\requests\sessions.py", line 542, in request
    resp = self.send(prep, **send_kwargs)
  File "C:\Program Files\ArcGIS\Pro\bin\Python\envs\arcgispro-dev\Lib\site-packages\requests\sessions.py", line 655, in send
    r = adapter.send(request, **kwargs)
  File "C:\Program Files\ArcGIS\Pro\bin\Python\envs\arcgispro-dev\Lib\site-packages\requests\adapters.py", line 449, in send
    timeout=timeout
  File "C:\Program Files\ArcGIS\Pro\bin\Python\envs\arcgispro-dev\Lib\site-packages\urllib3\connectionpool.py", line 696, in urlopen
    self._prepare_proxy(conn)
  File "C:\Program Files\ArcGIS\Pro\bin\Python\envs\arcgispro-dev\Lib\site-packages\urllib3\connectionpool.py", line 964, in _prepare_proxy
    conn.connect()
  File "C:\Program Files\ArcGIS\Pro\bin\Python\envs\arcgispro-dev\Lib\site-packages\urllib3\connection.py", line 359, in connect
    conn = self._connect_tls_proxy(hostname, conn)
  File "C:\Program Files\ArcGIS\Pro\bin\Python\envs\arcgispro-dev\Lib\site-packages\urllib3\connection.py", line 506, in _connect_tls_proxy
    ssl_context=ssl_context,
  File "C:\Program Files\ArcGIS\Pro\bin\Python\envs\arcgispro-dev\Lib\site-packages\urllib3\util\ssl_.py", line 432, in ssl_wrap_socket
    ssl_sock = _ssl_wrap_socket_impl(sock, context, tls_in_tls)
  File "C:\Program Files\ArcGIS\Pro\bin\Python\envs\arcgispro-dev\Lib\site-packages\urllib3\util\ssl_.py", line 474, in _ssl_wrap_socket_impl
    return ssl_context.wrap_socket(sock)
  File "C:\Program Files\ArcGIS\Pro\bin\Python\envs\arcgispro-dev\Lib\ssl.py", line 423, in wrap_socket
    session=session
  File "C:\Program Files\ArcGIS\Pro\bin\Python\envs\arcgispro-dev\Lib\ssl.py", line 827, in _create
    raise ValueError("check_hostname requires server_hostname")
builtins.ValueError: check_hostname requires server_hostname

$ python -m requests.help

{
  "chardet": {
    "version": "4.0.0"
  },
  "cryptography": {
    "version": "3.3.1"
  },
  "idna": {
    "version": "2.10"
  },
  "implementation": {
    "name": "CPython",
    "version": "3.7.10"
  },
  "platform": {
    "release": "10",
    "system": "Windows"
  },
  "pyOpenSSL": {
    "openssl_version": "1010109f",
    "version": "20.0.1"
  },
  "requests": {
    "version": "2.25.1"
  },
  "system_ssl": {
    "version": "1010109f"
  },
  "urllib3": {
    "version": "1.25.11"
  },
  "using_pyopenssl": true
}