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Improved typing for __array__ #138

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Improved typing for __array__ #138

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f69472f
Improved typing for `__array__`
kylebarron Jan 28, 2026
2455bf2
Merge branch 'main' into kyle/__array__-typing
kylebarron Feb 3, 2026
01c0a0f
Hard-code return value as np.float64
kylebarron Feb 3, 2026
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12 changes: 11 additions & 1 deletion src/affine/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -37,10 +37,20 @@
from collections.abc import MutableSequence, Sequence
from functools import cached_property
import math
from typing import TYPE_CHECKING, overload
import warnings

from attrs import astuple, define, field

if TYPE_CHECKING:
from typing import TypeVar, overload

import numpy as np
from numpy.typing import NDArray

_ScalarType = TypeVar("_ScalarType", bound=np.generic)


__all__ = ["Affine"]
__author__ = "Sean Gillies"
__version__ = "3.0rc2"
Expand Down Expand Up @@ -280,7 +290,7 @@ def permutation(cls, *scaling: float) -> Affine:
"""
return cls(0.0, 1.0, 0.0, 1.0, 0.0, 0.0)

def __array__(self, dtype=None, copy: bool | None = None):
def __array__(self, dtype=None, copy: bool | None = None) -> NDArray[np.float64]:
"""Get affine matrix as a 3x3 NumPy array.

Parameters
Expand Down