pymc-devs / pymc-devs/pytensor

Numba doesn't respect scalar types

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bug numba
Dominant language
Python
Stars
644
Forks
208
Avg merge
2d 14h
Merged PRs (30d)
16

Description

Description

Example revealed in #1406

import numpy as np
import pytensor.scalar as ps

x = ps.float64("x")
y = x.astype("float32")
y.eval({x: np.int64(0.0)}, mode="NUMBA").dtype  # AttributeError: 'float' object has no attribute 'dtype'

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First steps

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Research direction

Start by reproducing the example using pytensor.scalar.float64, astype("float32"), the np.int64 input, and mode="NUMBA". Trace the scalar evaluation path and confirm that the cast result preserves a usable scalar dtype instead of returning a plain float without dtype information.

Written by the indexing model from the issue text.

Assessment

Tech stack
numpy, python
Domain
backend
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
42/100

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