casting to `quaddtype` emits uneccesary warnings
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- Python
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Description
When using np.astype and the array has inf or nan, I see a RuntimeWarning: invalid value encountered in cast. On internal numpy float dtypes these are not emitted.
Run with python -Walways
import numpy as np
import numpy_quaddtype
a = np.arange(30, dtype=np.float32);
a[-1] = np.inf
q = numpy_quaddtype.QuadPrecision
d = np.float64
warns = a.astype(q)
# <stdin>:1: RuntimeWarning: invalid value encountered in cast
nowarns = a.astype(d)
# This does not warn
warns.astype(d)
I think this is coming from sleef?
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Research direction
Start by running the provided Python reproducer with python -Walways and compare astype behavior for numpy_quaddtype.QuadPrecision and np.float64. Trace the cast path and investigate the suspected sleef involvement; done means converting arrays containing inf or nan no longer emits the unnecessary warning.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python
- Domain
- data
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100