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DeprecationWarning: __array__ implementation doesn't accept a copy keyword #706
Description
import numpy as np
from juliacall import Main as jl
a = jl.seval('[1//2, 2//3]')
np.array(a)raises a warning:
<python-input-0>:4: DeprecationWarning: __array__ implementation doesn't accept a copy keyword, so passing copy=False failed. __array__ must implement 'dtype' and 'copy' keyword arguments. To learn more, see the migration guide https://numpy.org/devdocs/numpy_2_0_migration_guide.html#adapting-to-changes-in-the-copy-keyword
array([Fraction(1, 2), Fraction(2, 3)], dtype=object)
But the following do not:
>>> a.to_numpy()
array([Fraction(1, 2), Fraction(2, 3)], dtype=object)
>>> a.__array__()
array([Fraction(1, 2), Fraction(2, 3)], dtype=object)And other numeric eltypes seem not:
>>> b = jl.seval('[1, 2, 3]')
>>> np.array(b)
array([1, 2, 3])>>> np.__version__
'2.3.3'
>>> import juliacall; juliacall.__version__
'0.9.28'
Activity
cjdoris commentedon Oct 26, 2025
Thanks yeah absolutely we should support the
copykeyword argument to__array__.