Hi there! Since earlier today I get a strange bug when running the following commands:

python3 -m pip install prefect==2.20.3
python3 -m prefect --version

This results in:

Traceback (most recent call last):
  File "<frozen runpy>", line 189, in _run_module_as_main
  File "<frozen runpy>", line 148, in _get_module_details
  File "<frozen runpy>", line 112, in _get_module_details
  File "/workspace/.pyenv_mirror/user/current/lib/python3.11/site-packages/prefect/__init__.py", line 30, in <module>
    from prefect.deployments import deploy
  File "/workspace/.pyenv_mirror/user/current/lib/python3.11/site-packages/prefect/deployments/__init__.py", line 2, in <module>
    import prefect.deployments.steps
  File "/workspace/.pyenv_mirror/user/current/lib/python3.11/site-packages/prefect/deployments/steps/__init__.py", line 2, in <module>
    from .pull import (
  File "/workspace/.pyenv_mirror/user/current/lib/python3.11/site-packages/prefect/deployments/steps/pull.py", line 9, in <module>
    from prefect.blocks.core import Block
  File "/workspace/.pyenv_mirror/user/current/lib/python3.11/site-packages/prefect/blocks/__init__.py", line 3, in <module>
    import prefect.blocks.notifications
  File "/workspace/.pyenv_mirror/user/current/lib/python3.11/site-packages/prefect/blocks/notifications.py", line 15, in <module>
    from prefect.blocks.abstract import NotificationBlock, NotificationError
  File "/workspace/.pyenv_mirror/user/current/lib/python3.11/site-packages/prefect/blocks/abstract.py", line 20, in <module>
    from prefect.blocks.core import Block
  File "/workspace/.pyenv_mirror/user/current/lib/python3.11/site-packages/prefect/blocks/core.py", line 44, in <module>
    from prefect.events.instrument import (
  File "/workspace/.pyenv_mirror/user/current/lib/python3.11/site-packages/prefect/events/__init__.py", line 45, in <module>
    from .clients import get_events_client, get_events_subscriber
  File "/workspace/.pyenv_mirror/user/current/lib/python3.11/site-packages/prefect/events/clients.py", line 31, in <module>
    from prefect.client.base import PrefectHttpxAsyncClient
  File "/workspace/.pyenv_mirror/user/current/lib/python3.11/site-packages/prefect/client/base.py", line 29, in <module>
    from prefect._vendor.starlette.testclient import TestClient
  File "/workspace/.pyenv_mirror/user/current/lib/python3.11/site-packages/prefect/_vendor/starlette/testclient.py", line 363, in <module>
    class TestClient(httpx.Client):
  File "/workspace/.pyenv_mirror/user/current/lib/python3.11/site-packages/prefect/_vendor/starlette/testclient.py", line 445, in TestClient
    url: httpx._types.URLTypes,
         ^^^^^^^^^^^^^^^^^^^^^
AttributeError: module 'httpx._types' has no attribute 'URLTypes'

My Python version 3.11.4

I'm getting the same error in a github workflow with python 3.11 and prefect 2.20.3. Did you figure out the culprit?

@Joe D Unfortunately not. I get this for the PrefectHQ/actions-prefect-auth@v1 GitHub action and when installing Prefect manually. This is very strange because 10 hours ago or so this still worked without any problems.

Hmm yep

prefect cloud login

in my workflow is resulting in that error, and it also ran fine yesterday 🫠

That appears to be the problem. I just tested

pip install httpx==0.27.0

and that resolves the error at least locally.