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from __future__ import annotations
from typing import TYPE_CHECKING, Any, Callable, TypeVar, Union, Protocol
from decimal import Decimal
from fractions import Fraction
from .compat import TypeAlias, Never
if TYPE_CHECKING:
from .facets.plain import PlainQuantity as Quantity
from .facets.plain import PlainUnit as Unit
from .util import UnitsContainer
HAS_NUMPY = False
if TYPE_CHECKING:
from .compat import HAS_NUMPY
if HAS_NUMPY:
from .compat import np
Scalar: TypeAlias = Union[float, int, Decimal, Fraction, np.number[Any]]
Array = np.ndarray[Any, Any]
else:
Scalar: TypeAlias = Union[float, int, Decimal, Fraction]
Array: TypeAlias = Never
# TODO: Change when Python 3.10 becomes minimal version.
Magnitude = Union[Scalar, Array]
UnitLike = Union[str, dict[str, Scalar], "UnitsContainer", "Unit"]
QuantityOrUnitLike = Union["Quantity", UnitLike]
Shape = tuple[int, ...]
S = TypeVar("S")
FuncType = Callable[..., Any]
F = TypeVar("F", bound=FuncType)
# TODO: Improve or delete types
QuantityArgument = Any
T = TypeVar("T")
class Handler(Protocol):
def __getitem__(self, item: type[T]) -> Callable[[T], None]:
...
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