Getting a ModuleNotFoundError: No module named 'idna' when import httpx in a conda environment?

[epicwhale]

In my conda environment (python 3.11), I install httpx using pip install httpx. I can confirm that both httpx and idna are installed, using:

pip list | grep httpx
pip list | grep idna

httpx                         0.26.0
idna                          3.4

But when I do an import httpx I keep getting a ModuleNotFoundError: No module named 'idna'

---------------------------------------------------------------------------
ModuleNotFoundError                       Traceback (most recent call last)
Cell In [5], line 3
      1 get_ipython().system('pip list | grep httpx')
      2 get_ipython().system('pip list | grep idna')
----> 3 import httpx

File ###/.conda/lib/python3.11/site-packages/httpx/__init__.py:2
      1 from .__version__ import __description__, __title__, __version__
----> 2 from ._api import delete, get, head, options, patch, post, put, request, stream
      3 from ._auth import Auth, BasicAuth, DigestAuth, NetRCAuth
      4 from ._client import USE_CLIENT_DEFAULT, AsyncClient, Client

File ###/.conda/lib/python3.11/site-packages/httpx/_api.py:4
      1 import typing
      2 from contextlib import contextmanager
----> 4 from ._client import Client
      5 from ._config import DEFAULT_TIMEOUT_CONFIG
      6 from ._models import Response

File ###/.conda/lib/python3.11/site-packages/httpx/_client.py:10
      7 from types import TracebackType
      9 from .__version__ import __version__
---> 10 from ._auth import Auth, BasicAuth, FunctionAuth
     11 from ._config import (
     12     DEFAULT_LIMITS,
     13     DEFAULT_MAX_REDIRECTS,
   (...)
     17     Timeout,
     18 )
     19 from ._decoders import SUPPORTED_DECODERS

File ###/.conda/lib/python3.11/site-packages/httpx/_auth.py:10
      7 from urllib.request import parse_http_list
      9 from ._exceptions import ProtocolError
---> 10 from ._models import Cookies, Request, Response
     11 from ._utils import to_bytes, to_str, unquote
     13 if typing.TYPE_CHECKING:  # pragma: no cover

File ###/.conda/lib/python3.11/site-packages/httpx/_models.py:44
     30 from ._status_codes import codes
     31 from ._types import (
     32     AsyncByteStream,
     33     CookieTypes,
   (...)
     42     SyncByteStream,
     43 )
---> 44 from ._urls import URL
     45 from ._utils import (
     46     is_known_encoding,
     47     normalize_header_key,
   (...)
     51     parse_header_links,
     52 )
     55 class Headers(typing.MutableMapping[str, str]):

File ###/.conda/lib/python3.11/site-packages/httpx/_urls.py:4
      1 import typing
      2 from urllib.parse import parse_qs, unquote
----> 4 import idna
      6 from ._types import QueryParamTypes, RawURL, URLTypes
      7 from ._urlparse import urlencode, urlparse

ModuleNotFoundError: No module named 'idna'

What am I missing?