Allow pydantic v2 using transitional v1 support

[adrianeboyd]

Description

Allow pydantic v2 using transitional v1 support.

Types of change

Enhancement?

Checklist

• I confirm that I have the right to submit this contribution under the project's MIT license.
• I ran the tests, and all new and existing tests passed.
• My changes don't require a change to the documentation, or if they do, I've added all required information.

[adrianeboyd]

@explosion-bot please test_slow

[adrianeboyd]

@explosion-bot please test_slow

[explosion-bot]

🪁 Successfully triggered build on Buildkite

URL: https://buildkite.com/explosion-ai/spacy-slow-tests/builds/440

[adrianeboyd]

wheelwright build (with some hacks to use pydantic v1 for testing on aarch64) is fine:

https://dev.azure.com/explosion-ai/Public/_build/results?buildId=26594&view=results

[meerfrau]

Are there specific instructions for using this?

I'm still getting ImportError: cannot import name 'ModelMetaclass' from 'pydantic.main' (/usr/lib/python3.10/site-packages/pydantic/main.py) with Pydantic 2 (both 2.0.3 or 2.3.0) w/ Py3.10

[adrianeboyd]

This is the error you would get if you have pydantic v2 installed with spacy v3.6.0 or earlier. Can you check with python -m pip check if there are any version conflicts for the installed packages?

[meerfrau]

I've switched back to pydantic v1

[maspotts]

I also am getting:

ImportError: cannot import name 'ModelMetaclass' from 'pydantic.main' (/Users/mike/.pyenv/versions/3.10.7/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/pydantic/main.py)

with pydantic 2.6.1 and spacy 3.7.4. what am I doing wrong?