Incompatible with pydantic 1.10.15

[Lintonash]

Incompatible with pydantic 1.10.15

[exs-dmiketa]

Hi, I added the pydantic.v1 namespace to pydantic==1.10.15 and effectively broke your code. I'll briefly explain the motivation for the change and how you can fix this issue on your end.

Before this PR it was a bit tricky to write Pydantic code which is compatible with both v1 and v2 while robustly satisfying type checkers and linters. As a result some extended codebases had to pin Pydantic to v1. With the introduction of pydantic.v1 inside pydantic==1.10.15 one can write from pydantic.v1 import ... and it'll work in both versions. Migrate your entire v1 codebase to this style and you will be able to release the version pin. Now compatible with pydantic>=2, you can organically migrate v1-style code to v2-style in your own time.

Now onto your issue. Instead of checking for the existence of pydantic.v1 - which is no longer a differentiator of versions - check the value of pydantic.VERSION instead.

[elliotgunton]

Incidentally this is the reason our CI checks have suddenly started failing for pydantic v1. We install poetry run pip install "pydantic<2" which wasn't expected to change again until pydantic/pydantic#9042