MyPy fails with new numpy dtype type hints

[ricardoV94]

Description

In #7792 mypy started failing, likely due to picking up new numpy versions.

I marked pymc/sampling/mcmc.py as failing type-hints for the purpose of the CI:

pymc/sampling/mcmc.py:837: error: Argument "random_seed" to "init_nuts" has incompatible type "list[signedinteger[_64Bit]]"; expected "int | Sequence[int] | ndarray[Any, Any] | None | None"

[Ok3ks]

Unable to replicate this issue locally. Interpreting this as resolved, and pehaps closing this issue

[ricardoV94]

No this isn't solved. You can try by opening a PR that undoes this commit 360cb6e and the CI should fail

[Ok3ks]

Coming back to this, apologies for delayed response.

I've been able to resolve this mypy error by switching from a list comprehension to an nd.array

random_seed_list = np.fromiter((rng.integers(2**30) for rng in rngs), dtype=np.int64)

This does not affect downstream usage below because ndArrays are also iterable

initial_points = [ipfn(seed) for ipfn, seed in zip(ipfns, random_seed_list)]

Here's a PR #7854