Merge pull request #18185 from BvB93/x-like

MAINT: Give the `_<X>Like` and `_ArrayLike<X>` type aliases a more descriptive name

8 files changed, 162 insertions, 154 deletions

diff --git a/numpy/__init__.pyi b/numpy/__init__.pyi
index 656048173..be87a166e 100644
--- a/numpy/__init__.pyi
+++ b/numpy/__init__.pyi
@@ -7,19 +7,28 @@ from contextlib import ContextDecorator
 
 from numpy.core._internal import _ctypes
 from numpy.typing import (
+    # Arrays
     ArrayLike,
+
+    # DTypes
     DTypeLike,
-    _Shape,
-    _ShapeLike,
-    _CharLike,
-    _BoolLike,
-    _IntLike,
-    _FloatLike,
-    _ComplexLike,
-    _TD64Like,
-    _NumberLike,
     _SupportsDType,
     _VoidDTypeLike,
+
+    # Shapes
+    _Shape,
+    _ShapeLike,
+
+    # Scalars
+    _CharLike_co,
+    _BoolLike_co,
+    _IntLike_co,
+    _FloatLike_co,
+    _ComplexLike_co,
+    _TD64Like_co,
+    _NumberLike_co,
+
+    # `number` precision
     NBitBase,
     _256Bit,
     _128Bit,
@@ -39,8 +48,8 @@ from numpy.typing import (
     _NBitSingle,
     _NBitDouble,
     _NBitLongDouble,
-)
-from numpy.typing import (
+
+    # Character codes
     _BoolCodes,
     _UInt8Codes,
     _UInt16Codes,
@@ -858,11 +867,11 @@ _PartitionKind = Literal["introselect"]
 _SortKind = Literal["quicksort", "mergesort", "heapsort", "stable"]
 _SortSide = Literal["left", "right"]
 
-_ArrayLikeBool = Union[_BoolLike, Sequence[_BoolLike], ndarray]
+_ArrayLikeBool = Union[_BoolLike_co, Sequence[_BoolLike_co], ndarray]
 _ArrayLikeIntOrBool = Union[
-    _IntLike,
+    _IntLike_co,
     ndarray,
-    Sequence[_IntLike],
+    Sequence[_IntLike_co],
     Sequence[Sequence[Any]],  # TODO: wait for support for recursive types
 ]
 
@@ -1073,7 +1082,7 @@ class _ArrayOrScalarCommon:
         axis: None = ...,
         out: None = ...,
         keepdims: Literal[False] = ...,
-        initial: _NumberLike = ...,
+        initial: _NumberLike_co = ...,
         where: _ArrayLikeBool = ...,
     ) -> number: ...
     @overload
@@ -1082,7 +1091,7 @@ class _ArrayOrScalarCommon:
         axis: Optional[_ShapeLike] = ...,
         out: None = ...,
         keepdims: bool = ...,
-        initial: _NumberLike = ...,
+        initial: _NumberLike_co = ...,
         where: _ArrayLikeBool = ...,
     ) -> Union[number, ndarray]: ...
     @overload
@@ -1091,7 +1100,7 @@ class _ArrayOrScalarCommon:
         axis: Optional[_ShapeLike] = ...,
         out: _NdArraySubClass = ...,
         keepdims: bool = ...,
-        initial: _NumberLike = ...,
+        initial: _NumberLike_co = ...,
         where: _ArrayLikeBool = ...,
     ) -> _NdArraySubClass: ...
     @overload
@@ -1124,7 +1133,7 @@ class _ArrayOrScalarCommon:
         axis: None = ...,
         out: None = ...,
         keepdims: Literal[False] = ...,
-        initial: _NumberLike = ...,
+        initial: _NumberLike_co = ...,
         where: _ArrayLikeBool = ...,
     ) -> number: ...
     @overload
@@ -1133,7 +1142,7 @@ class _ArrayOrScalarCommon:
         axis: Optional[_ShapeLike] = ...,
         out: None = ...,
         keepdims: bool = ...,
-        initial: _NumberLike = ...,
+        initial: _NumberLike_co = ...,
         where: _ArrayLikeBool = ...,
     ) -> Union[number, ndarray]: ...
     @overload
@@ -1142,7 +1151,7 @@ class _ArrayOrScalarCommon:
         axis: Optional[_ShapeLike] = ...,
         out: _NdArraySubClass = ...,
         keepdims: bool = ...,
-        initial: _NumberLike = ...,
+        initial: _NumberLike_co = ...,
         where: _ArrayLikeBool = ...,
     ) -> _NdArraySubClass: ...
     def newbyteorder(self: _ArraySelf, __new_order: _ByteOrder = ...) -> _ArraySelf: ...
@@ -1153,7 +1162,7 @@ class _ArrayOrScalarCommon:
         dtype: DTypeLike = ...,
         out: None = ...,
         keepdims: Literal[False] = ...,
-        initial: _NumberLike = ...,
+        initial: _NumberLike_co = ...,
         where: _ArrayLikeBool = ...,
     ) -> number: ...
     @overload
@@ -1163,7 +1172,7 @@ class _ArrayOrScalarCommon:
         dtype: DTypeLike = ...,
         out: None = ...,
         keepdims: bool = ...,
-        initial: _NumberLike = ...,
+        initial: _NumberLike_co = ...,
         where: _ArrayLikeBool = ...,
     ) -> Union[number, ndarray]: ...
     @overload
@@ -1173,7 +1182,7 @@ class _ArrayOrScalarCommon:
         dtype: DTypeLike = ...,
         out: _NdArraySubClass = ...,
         keepdims: bool = ...,
-        initial: _NumberLike = ...,
+        initial: _NumberLike_co = ...,
         where: _ArrayLikeBool = ...,
     ) -> _NdArraySubClass: ...
     @overload
@@ -1234,7 +1243,7 @@ class _ArrayOrScalarCommon:
         dtype: DTypeLike = ...,
         out: None = ...,
         keepdims: Literal[False] = ...,
-        initial: _NumberLike = ...,
+        initial: _NumberLike_co = ...,
         where: _ArrayLikeBool = ...,
     ) -> number: ...
     @overload
@@ -1244,7 +1253,7 @@ class _ArrayOrScalarCommon:
         dtype: DTypeLike = ...,
         out: None = ...,
         keepdims: bool = ...,
-        initial: _NumberLike = ...,
+        initial: _NumberLike_co = ...,
         where: _ArrayLikeBool = ...,
     ) -> Union[number, ndarray]: ...
     @overload
@@ -1254,13 +1263,13 @@ class _ArrayOrScalarCommon:
         dtype: DTypeLike = ...,
         out: _NdArraySubClass = ...,
         keepdims: bool = ...,
-        initial: _NumberLike = ...,
+        initial: _NumberLike_co = ...,
         where: _ArrayLikeBool = ...,
     ) -> _NdArraySubClass: ...
     @overload
     def take(
         self,
-        indices: _IntLike,
+        indices: _IntLike_co,
         axis: Optional[int] = ...,
         out: None = ...,
         mode: _ModeKind = ...,
@@ -1577,10 +1586,10 @@ class number(generic, Generic[_NBit_co]):  # type: ignore
     __rpow__: _NumberOp
     __truediv__: _NumberOp
     __rtruediv__: _NumberOp
-    __lt__: _ComparisonOp[_NumberLike]
-    __le__: _ComparisonOp[_NumberLike]
-    __gt__: _ComparisonOp[_NumberLike]
-    __ge__: _ComparisonOp[_NumberLike]
+    __lt__: _ComparisonOp[_NumberLike_co]
+    __le__: _ComparisonOp[_NumberLike_co]
+    __gt__: _ComparisonOp[_NumberLike_co]
+    __ge__: _ComparisonOp[_NumberLike_co]
 
 class bool_(generic):
     def __init__(self, __value: object = ...) -> None: ...
@@ -1619,10 +1628,10 @@ class bool_(generic):
     __rmod__: _BoolMod
     __divmod__: _BoolDivMod
     __rdivmod__: _BoolDivMod
-    __lt__: _ComparisonOp[_NumberLike]
-    __le__: _ComparisonOp[_NumberLike]
-    __gt__: _ComparisonOp[_NumberLike]
-    __ge__: _ComparisonOp[_NumberLike]
+    __lt__: _ComparisonOp[_NumberLike_co]
+    __le__: _ComparisonOp[_NumberLike_co]
+    __gt__: _ComparisonOp[_NumberLike_co]
+    __ge__: _ComparisonOp[_NumberLike_co]
 
 class object_(generic):
     def __init__(self, __value: object = ...) -> None: ...
@@ -1635,21 +1644,21 @@ class datetime64(generic):
     @overload
     def __init__(
         self,
-        __value: Union[None, datetime64, _CharLike, dt.datetime] = ...,
-        __format: Union[_CharLike, Tuple[_CharLike, _IntLike]] = ...,
+        __value: Union[None, datetime64, _CharLike_co, dt.datetime] = ...,
+        __format: Union[_CharLike_co, Tuple[_CharLike_co, _IntLike_co]] = ...,
     ) -> None: ...
     @overload
     def __init__(
         self,
         __value: int,
-        __format: Union[_CharLike, Tuple[_CharLike, _IntLike]]
+        __format: Union[_CharLike_co, Tuple[_CharLike_co, _IntLike_co]]
     ) -> None: ...
-    def __add__(self, other: _TD64Like) -> datetime64: ...
-    def __radd__(self, other: _TD64Like) -> datetime64: ...
+    def __add__(self, other: _TD64Like_co) -> datetime64: ...
+    def __radd__(self, other: _TD64Like_co) -> datetime64: ...
     @overload
     def __sub__(self, other: datetime64) -> timedelta64: ...
     @overload
-    def __sub__(self, other: _TD64Like) -> datetime64: ...
+    def __sub__(self, other: _TD64Like_co) -> datetime64: ...
     def __rsub__(self, other: datetime64) -> timedelta64: ...
     __lt__: _ComparisonOp[datetime64]
     __le__: _ComparisonOp[datetime64]
@@ -1658,13 +1667,13 @@ class datetime64(generic):
 
 # Support for `__index__` was added in python 3.8 (bpo-20092)
 if sys.version_info >= (3, 8):
-    _IntValue = Union[SupportsInt, _CharLike, SupportsIndex]
-    _FloatValue = Union[None, _CharLike, SupportsFloat, SupportsIndex]
-    _ComplexValue = Union[None, _CharLike, SupportsFloat, SupportsComplex, SupportsIndex]
+    _IntValue = Union[SupportsInt, _CharLike_co, SupportsIndex]
+    _FloatValue = Union[None, _CharLike_co, SupportsFloat, SupportsIndex]
+    _ComplexValue = Union[None, _CharLike_co, SupportsFloat, SupportsComplex, SupportsIndex]
 else:
-    _IntValue = Union[SupportsInt, _CharLike]
-    _FloatValue = Union[None, _CharLike, SupportsFloat]
-    _ComplexValue = Union[None, _CharLike, SupportsFloat, SupportsComplex]
+    _IntValue = Union[SupportsInt, _CharLike_co]
+    _FloatValue = Union[None, _CharLike_co, SupportsFloat]
+    _ComplexValue = Union[None, _CharLike_co, SupportsFloat, SupportsComplex]
 
 class integer(number[_NBit_co]):  # type: ignore
     # NOTE: `__index__` is technically defined in the bottom-most
@@ -1672,20 +1681,20 @@ class integer(number[_NBit_co]):  # type: ignore
     def __index__(self) -> int: ...
     __truediv__: _IntTrueDiv[_NBit_co]
     __rtruediv__: _IntTrueDiv[_NBit_co]
-    def __mod__(self, value: _IntLike) -> integer: ...
-    def __rmod__(self, value: _IntLike) -> integer: ...
+    def __mod__(self, value: _IntLike_co) -> integer: ...
+    def __rmod__(self, value: _IntLike_co) -> integer: ...
     def __invert__(self: _IntType) -> _IntType: ...
     # Ensure that objects annotated as `integer` support bit-wise operations
-    def __lshift__(self, other: _IntLike) -> integer: ...
-    def __rlshift__(self, other: _IntLike) -> integer: ...
-    def __rshift__(self, other: _IntLike) -> integer: ...
-    def __rrshift__(self, other: _IntLike) -> integer: ...
-    def __and__(self, other: _IntLike) -> integer: ...
-    def __rand__(self, other: _IntLike) -> integer: ...
-    def __or__(self, other: _IntLike) -> integer: ...
-    def __ror__(self, other: _IntLike) -> integer: ...
-    def __xor__(self, other: _IntLike) -> integer: ...
-    def __rxor__(self, other: _IntLike) -> integer: ...
+    def __lshift__(self, other: _IntLike_co) -> integer: ...
+    def __rlshift__(self, other: _IntLike_co) -> integer: ...
+    def __rshift__(self, other: _IntLike_co) -> integer: ...
+    def __rrshift__(self, other: _IntLike_co) -> integer: ...
+    def __and__(self, other: _IntLike_co) -> integer: ...
+    def __rand__(self, other: _IntLike_co) -> integer: ...
+    def __or__(self, other: _IntLike_co) -> integer: ...
+    def __ror__(self, other: _IntLike_co) -> integer: ...
+    def __xor__(self, other: _IntLike_co) -> integer: ...
+    def __rxor__(self, other: _IntLike_co) -> integer: ...
 
 class signedinteger(integer[_NBit_co]):
     def __init__(self, __value: _IntValue = ...) -> None: ...
@@ -1730,8 +1739,8 @@ longlong = signedinteger[_NBitLongLong]
 class timedelta64(generic):
     def __init__(
         self,
-        __value: Union[None, int, _CharLike, dt.timedelta, timedelta64] = ...,
-        __format: Union[_CharLike, Tuple[_CharLike, _IntLike]] = ...,
+        __value: Union[None, int, _CharLike_co, dt.timedelta, timedelta64] = ...,
+        __format: Union[_CharLike_co, Tuple[_CharLike_co, _IntLike_co]] = ...,
     ) -> None: ...
     def __int__(self) -> int: ...
     def __float__(self) -> float: ...
@@ -1739,12 +1748,12 @@ class timedelta64(generic):
     def __neg__(self: _ArraySelf) -> _ArraySelf: ...
     def __pos__(self: _ArraySelf) -> _ArraySelf: ...
     def __abs__(self: _ArraySelf) -> _ArraySelf: ...
-    def __add__(self, other: _TD64Like) -> timedelta64: ...
-    def __radd__(self, other: _TD64Like) -> timedelta64: ...
-    def __sub__(self, other: _TD64Like) -> timedelta64: ...
-    def __rsub__(self, other: _TD64Like) -> timedelta64: ...
-    def __mul__(self, other: _FloatLike) -> timedelta64: ...
-    def __rmul__(self, other: _FloatLike) -> timedelta64: ...
+    def __add__(self, other: _TD64Like_co) -> timedelta64: ...
+    def __radd__(self, other: _TD64Like_co) -> timedelta64: ...
+    def __sub__(self, other: _TD64Like_co) -> timedelta64: ...
+    def __rsub__(self, other: _TD64Like_co) -> timedelta64: ...
+    def __mul__(self, other: _FloatLike_co) -> timedelta64: ...
+    def __rmul__(self, other: _FloatLike_co) -> timedelta64: ...
     __truediv__: _TD64Div[float64]
     __floordiv__: _TD64Div[int64]
     def __rtruediv__(self, other: timedelta64) -> float64: ...
@@ -1753,10 +1762,10 @@ class timedelta64(generic):
     def __rmod__(self, other: timedelta64) -> timedelta64: ...
     def __divmod__(self, other: timedelta64) -> Tuple[int64, timedelta64]: ...
     def __rdivmod__(self, other: timedelta64) -> Tuple[int64, timedelta64]: ...
-    __lt__: _ComparisonOp[Union[timedelta64, _IntLike, _BoolLike]]
-    __le__: _ComparisonOp[Union[timedelta64, _IntLike, _BoolLike]]
-    __gt__: _ComparisonOp[Union[timedelta64, _IntLike, _BoolLike]]
-    __ge__: _ComparisonOp[Union[timedelta64, _IntLike, _BoolLike]]
+    __lt__: _ComparisonOp[Union[timedelta64, _IntLike_co, _BoolLike_co]]
+    __le__: _ComparisonOp[Union[timedelta64, _IntLike_co, _BoolLike_co]]
+    __gt__: _ComparisonOp[Union[timedelta64, _IntLike_co, _BoolLike_co]]
+    __ge__: _ComparisonOp[Union[timedelta64, _IntLike_co, _BoolLike_co]]
 
 class unsignedinteger(integer[_NBit_co]):
     # NOTE: `uint64 + signedinteger -> float64`
@@ -1873,7 +1882,7 @@ longcomplex = complexfloating[_NBitLongDouble, _NBitLongDouble]
 class flexible(generic): ...  # type: ignore
 
 class void(flexible):
-    def __init__(self, __value: Union[_IntLike, bytes]): ...
+    def __init__(self, __value: Union[_IntLike_co, bytes]): ...
     @property
     def real(self: _ArraySelf) -> _ArraySelf: ...
     @property
diff --git a/numpy/core/arrayprint.pyi b/numpy/core/arrayprint.pyi
index 6aaae0320..b2565b345 100644
--- a/numpy/core/arrayprint.pyi
+++ b/numpy/core/arrayprint.pyi
@@ -21,7 +21,7 @@ from numpy import (
     longdouble,
     clongdouble,
 )
-from numpy.typing import ArrayLike, _CharLike, _FloatLike
+from numpy.typing import ArrayLike, _CharLike_co, _FloatLike_co
 
 if sys.version_info > (3, 8):
     from typing import Literal, TypedDict
@@ -40,13 +40,13 @@ class _FormatDict(TypedDict, total=False):
     complexfloat: Callable[[complexfloating[Any, Any]], str]
     longcomplexfloat: Callable[[clongdouble], str]
     void: Callable[[void], str]
-    numpystr: Callable[[_CharLike], str]
+    numpystr: Callable[[_CharLike_co], str]
     object: Callable[[object], str]
     all: Callable[[object], str]
     int_kind: Callable[[integer[Any]], str]
     float_kind: Callable[[floating[Any]], str]
     complex_kind: Callable[[complexfloating[Any, Any]], str]
-    str_kind: Callable[[_CharLike], str]
+    str_kind: Callable[[_CharLike_co], str]
 
 class _FormatOptions(TypedDict):
     precision: int
@@ -96,7 +96,7 @@ def array2string(
     legacy: Optional[Literal[False, "1.13"]] = ...,
 ) -> str: ...
 def format_float_scientific(
-    x: _FloatLike,
+    x: _FloatLike_co,
     precision: Optional[int] = ...,
     unique: bool = ...,
     trim: Literal["k", ".", "0", "-"] = ...,
@@ -105,7 +105,7 @@ def format_float_scientific(
     exp_digits: Optional[int] = ...,
 ) -> str: ...
 def format_float_positional(
-    x: _FloatLike,
+    x: _FloatLike_co,
     precision: Optional[int] = ...,
     unique: bool = ...,
     fractional: bool = ...,
diff --git a/numpy/core/fromnumeric.pyi b/numpy/core/fromnumeric.pyi
index 3b147e1d7..fc7f28a59 100644
--- a/numpy/core/fromnumeric.pyi
+++ b/numpy/core/fromnumeric.pyi
@@ -23,9 +23,8 @@ from numpy.typing import (
     ArrayLike,
     _ShapeLike,
     _Shape,
-    _IntLike,
-    _BoolLike,
-    _NumberLike,
+    _IntLike_co,
+    _NumberLike_co,
 )
 
 if sys.version_info >= (3, 8):
@@ -98,7 +97,7 @@ def choose(
 ) -> _ScalarIntOrBool: ...
 @overload
 def choose(
-    a: Union[_IntLike, _BoolLike], choices: ArrayLike, out: Optional[ndarray] = ..., mode: _ModeKind = ...
+    a: _IntLike_co, choices: ArrayLike, out: Optional[ndarray] = ..., mode: _ModeKind = ...
 ) -> Union[integer, bool_]: ...
 @overload
 def choose(
@@ -250,7 +249,7 @@ def sum(
     dtype: DTypeLike = ...,
     out: Optional[ndarray] = ...,
     keepdims: bool = ...,
-    initial: _NumberLike = ...,
+    initial: _NumberLike_co = ...,
     where: _ArrayLikeBool = ...,
 ) -> _Number: ...
 @overload
@@ -260,7 +259,7 @@ def sum(
     dtype: DTypeLike = ...,
     out: Optional[ndarray] = ...,
     keepdims: bool = ...,
-    initial: _NumberLike = ...,
+    initial: _NumberLike_co = ...,
     where: _ArrayLikeBool = ...,
 ) -> Union[number, ndarray]: ...
 @overload
@@ -324,7 +323,7 @@ def amax(
     axis: Optional[_ShapeLike] = ...,
     out: Optional[ndarray] = ...,
     keepdims: bool = ...,
-    initial: _NumberLike = ...,
+    initial: _NumberLike_co = ...,
     where: _ArrayLikeBool = ...,
 ) -> _Number: ...
 @overload
@@ -333,7 +332,7 @@ def amax(
     axis: None = ...,
     out: Optional[ndarray] = ...,
     keepdims: Literal[False] = ...,
-    initial: _NumberLike = ...,
+    initial: _NumberLike_co = ...,
     where: _ArrayLikeBool = ...,
 ) -> number: ...
 @overload
@@ -342,7 +341,7 @@ def amax(
     axis: Optional[_ShapeLike] = ...,
     out: Optional[ndarray] = ...,
     keepdims: bool = ...,
-    initial: _NumberLike = ...,
+    initial: _NumberLike_co = ...,
     where: _ArrayLikeBool = ...,
 ) -> Union[number, ndarray]: ...
 @overload
@@ -351,7 +350,7 @@ def amin(
     axis: Optional[_ShapeLike] = ...,
     out: Optional[ndarray] = ...,
     keepdims: bool = ...,
-    initial: _NumberLike = ...,
+    initial: _NumberLike_co = ...,
     where: _ArrayLikeBool = ...,
 ) -> _Number: ...
 @overload
@@ -360,7 +359,7 @@ def amin(
     axis: None = ...,
     out: Optional[ndarray] = ...,
     keepdims: Literal[False] = ...,
-    initial: _NumberLike = ...,
+    initial: _NumberLike_co = ...,
     where: _ArrayLikeBool = ...,
 ) -> number: ...
 @overload
@@ -369,7 +368,7 @@ def amin(
     axis: Optional[_ShapeLike] = ...,
     out: Optional[ndarray] = ...,
     keepdims: bool = ...,
-    initial: _NumberLike = ...,
+    initial: _NumberLike_co = ...,
     where: _ArrayLikeBool = ...,
 ) -> Union[number, ndarray]: ...
 
@@ -387,7 +386,7 @@ def prod(
     dtype: DTypeLike = ...,
     out: None = ...,
     keepdims: bool = ...,
-    initial: _NumberLike = ...,
+    initial: _NumberLike_co = ...,
     where: _ArrayLikeBool = ...,
 ) -> _Number: ...
 @overload
@@ -397,7 +396,7 @@ def prod(
     dtype: DTypeLike = ...,
     out: None = ...,
     keepdims: Literal[False] = ...,
-    initial: _NumberLike = ...,
+    initial: _NumberLike_co = ...,
     where: _ArrayLikeBool = ...,
 ) -> number: ...
 @overload
@@ -407,7 +406,7 @@ def prod(
     dtype: DTypeLike = ...,
     out: Optional[ndarray] = ...,
     keepdims: bool = ...,
-    initial: _NumberLike = ...,
+    initial: _NumberLike_co = ...,
     where: _ArrayLikeBool = ...,
 ) -> Union[number, ndarray]: ...
 def cumprod(
@@ -424,7 +423,7 @@ def around(
 ) -> _Number: ...
 @overload
 def around(
-    a: _NumberLike, decimals: int = ..., out: Optional[ndarray] = ...
+    a: _NumberLike_co, decimals: int = ..., out: Optional[ndarray] = ...
 ) -> number: ...
 @overload
 def around(
diff --git a/numpy/core/function_base.pyi b/numpy/core/function_base.pyi
index 1490bed4a..d353543f6 100644
--- a/numpy/core/function_base.pyi
+++ b/numpy/core/function_base.pyi
@@ -2,7 +2,7 @@ import sys
 from typing import overload, Tuple, Union, Sequence, Any
 
 from numpy import ndarray, inexact
-from numpy.typing import ArrayLike, DTypeLike, _SupportsArray, _NumberLike
+from numpy.typing import ArrayLike, DTypeLike, _SupportsArray, _NumberLike_co
 
 if sys.version_info >= (3, 8):
     from typing import SupportsIndex, Literal
@@ -15,7 +15,7 @@ else:
 # TODO: wait for support for recursive types
 _ArrayLikeNested = Sequence[Sequence[Any]]
 _ArrayLikeNumber = Union[
-    _NumberLike, Sequence[_NumberLike], ndarray, _SupportsArray, _ArrayLikeNested
+    _NumberLike_co, Sequence[_NumberLike_co], ndarray, _SupportsArray, _ArrayLikeNested
 ]
 @overload
 def linspace(
diff --git a/numpy/typing/__init__.py b/numpy/typing/__init__.py
index 86bba57be..97b87a682 100644
--- a/numpy/typing/__init__.py
+++ b/numpy/typing/__init__.py
@@ -283,16 +283,16 @@ from ._char_codes import (
     _ObjectCodes,
 )
 from ._scalars import (
-    _CharLike,
-    _BoolLike,
-    _UIntLike,
-    _IntLike,
-    _FloatLike,
-    _ComplexLike,
-    _TD64Like,
-    _NumberLike,
-    _ScalarLike,
-    _VoidLike,
+    _CharLike_co,
+    _BoolLike_co,
+    _UIntLike_co,
+    _IntLike_co,
+    _FloatLike_co,
+    _ComplexLike_co,
+    _TD64Like_co,
+    _NumberLike_co,
+    _ScalarLike_co,
+    _VoidLike_co,
 )
 from ._shape import _Shape, _ShapeLike
 from ._dtype_like import _SupportsDType, _VoidDTypeLike, DTypeLike
@@ -301,17 +301,17 @@ from ._array_like import (
     _ArrayLike,
     _NestedSequence,
     _SupportsArray,
-    _ArrayLikeBool,
-    _ArrayLikeUInt,
-    _ArrayLikeInt,
-    _ArrayLikeFloat,
-    _ArrayLikeComplex,
-    _ArrayLikeTD64,
-    _ArrayLikeDT64,
-    _ArrayLikeObject,
-    _ArrayLikeVoid,
-    _ArrayLikeStr,
-    _ArrayLikeBytes,
+    _ArrayLikeBool_co,
+    _ArrayLikeUInt_co,
+    _ArrayLikeInt_co,
+    _ArrayLikeFloat_co,
+    _ArrayLikeComplex_co,
+    _ArrayLikeTD64_co,
+    _ArrayLikeDT64_co,
+    _ArrayLikeObject_co,
+    _ArrayLikeVoid_co,
+    _ArrayLikeStr_co,
+    _ArrayLikeBytes_co,
 )
 
 if __doc__ is not None:
diff --git a/numpy/typing/_array_like.py b/numpy/typing/_array_like.py
index d6473442c..35413393c 100644
--- a/numpy/typing/_array_like.py
+++ b/numpy/typing/_array_like.py
@@ -78,41 +78,41 @@ ArrayLike = Union[
     ],
 ]
 
-# `ArrayLike<X>`: array-like objects that can be coerced into `X`
+# `ArrayLike<X>_co`: array-like objects that can be coerced into `X`
 # given the casting rules `same_kind`
-_ArrayLikeBool = _ArrayLike[
+_ArrayLikeBool_co = _ArrayLike[
     "dtype[bool_]",
     bool,
 ]
-_ArrayLikeUInt = _ArrayLike[
+_ArrayLikeUInt_co = _ArrayLike[
     "dtype[Union[bool_, unsignedinteger[Any]]]",
     bool,
 ]
-_ArrayLikeInt = _ArrayLike[
+_ArrayLikeInt_co = _ArrayLike[
     "dtype[Union[bool_, integer[Any]]]",
     Union[bool, int],
 ]
-_ArrayLikeFloat = _ArrayLike[
+_ArrayLikeFloat_co = _ArrayLike[
     "dtype[Union[bool_, integer[Any], floating[Any]]]",
     Union[bool, int, float],
 ]
-_ArrayLikeComplex = _ArrayLike[
+_ArrayLikeComplex_co = _ArrayLike[
     "dtype[Union[bool_, integer[Any], floating[Any], complexfloating[Any, Any]]]",
     Union[bool, int, float, complex],
 ]
-_ArrayLikeTD64 = _ArrayLike[
+_ArrayLikeTD64_co = _ArrayLike[
     "dtype[Union[bool_, integer[Any], timedelta64]]",
     Union[bool, int],
 ]
-_ArrayLikeDT64 = _NestedSequence[_SupportsArray["dtype[datetime64]"]]
-_ArrayLikeObject = _NestedSequence[_SupportsArray["dtype[object_]"]]
+_ArrayLikeDT64_co = _NestedSequence[_SupportsArray["dtype[datetime64]"]]
+_ArrayLikeObject_co = _NestedSequence[_SupportsArray["dtype[object_]"]]
 
-_ArrayLikeVoid = _NestedSequence[_SupportsArray["dtype[void]"]]
-_ArrayLikeStr = _ArrayLike[
+_ArrayLikeVoid_co = _NestedSequence[_SupportsArray["dtype[void]"]]
+_ArrayLikeStr_co = _ArrayLike[
     "dtype[str_]",
     str,
 ]
-_ArrayLikeBytes = _ArrayLike[
+_ArrayLikeBytes_co = _ArrayLike[
     "dtype[bytes_]",
     bytes,
 ]
diff --git a/numpy/typing/_callable.py b/numpy/typing/_callable.py
index 8f464cc75..693b6dfed 100644
--- a/numpy/typing/_callable.py
+++ b/numpy/typing/_callable.py
@@ -37,11 +37,11 @@ from numpy import (
 )
 from ._nbit import _NBitInt
 from ._scalars import (
-    _BoolLike,
-    _IntLike,
-    _FloatLike,
-    _ComplexLike,
-    _NumberLike,
+    _BoolLike_co,
+    _IntLike_co,
+    _FloatLike_co,
+    _ComplexLike_co,
+    _NumberLike_co,
 )
 from . import NBitBase
 from ._array_like import ArrayLike
@@ -72,7 +72,7 @@ if TYPE_CHECKING or HAVE_PROTOCOL:
 
     class _BoolOp(Protocol[_GenericType_co]):
         @overload
-        def __call__(self, __other: _BoolLike) -> _GenericType_co: ...
+        def __call__(self, __other: _BoolLike_co) -> _GenericType_co: ...
         @overload  # platform dependent
         def __call__(self, __other: int) -> int_: ...
         @overload
@@ -84,7 +84,7 @@ if TYPE_CHECKING or HAVE_PROTOCOL:
 
     class _BoolBitOp(Protocol[_GenericType_co]):
         @overload
-        def __call__(self, __other: _BoolLike) -> _GenericType_co: ...
+        def __call__(self, __other: _BoolLike_co) -> _GenericType_co: ...
         @overload  # platform dependent
         def __call__(self, __other: int) -> int_: ...
         @overload
@@ -105,7 +105,7 @@ if TYPE_CHECKING or HAVE_PROTOCOL:
 
     class _BoolTrueDiv(Protocol):
         @overload
-        def __call__(self, __other: Union[float, _IntLike]) -> float64: ...
+        def __call__(self, __other: Union[float, _IntLike_co]) -> float64: ...
         @overload
         def __call__(self, __other: complex) -> complex128: ...
         @overload
@@ -113,7 +113,7 @@ if TYPE_CHECKING or HAVE_PROTOCOL:
 
     class _BoolMod(Protocol):
         @overload
-        def __call__(self, __other: _BoolLike) -> int8: ...
+        def __call__(self, __other: _BoolLike_co) -> int8: ...
         @overload  # platform dependent
         def __call__(self, __other: int) -> int_: ...
         @overload
@@ -125,7 +125,7 @@ if TYPE_CHECKING or HAVE_PROTOCOL:
 
     class _BoolDivMod(Protocol):
         @overload
-        def __call__(self, __other: _BoolLike) -> _2Tuple[int8]: ...
+        def __call__(self, __other: _BoolLike_co) -> _2Tuple[int8]: ...
         @overload  # platform dependent
         def __call__(self, __other: int) -> _2Tuple[int_]: ...
         @overload
@@ -139,7 +139,7 @@ if TYPE_CHECKING or HAVE_PROTOCOL:
         @overload
         def __call__(self, __other: timedelta64) -> _NumberType_co: ...
         @overload
-        def __call__(self, __other: _FloatLike) -> timedelta64: ...
+        def __call__(self, __other: _FloatLike_co) -> timedelta64: ...
 
     class _IntTrueDiv(Protocol[_NBit_co]):
         @overload
@@ -314,7 +314,7 @@ if TYPE_CHECKING or HAVE_PROTOCOL:
         ) -> complexfloating[Union[_NBit_co, _NBit], Union[_NBit_co, _NBit]]: ...
 
     class _NumberOp(Protocol):
-        def __call__(self, __other: _NumberLike) -> number: ...
+        def __call__(self, __other: _NumberLike_co) -> number: ...
 
     class _ComparisonOp(Protocol[_T]):
         @overload
diff --git a/numpy/typing/_scalars.py b/numpy/typing/_scalars.py
index 90b2eff7b..516b996dc 100644
--- a/numpy/typing/_scalars.py
+++ b/numpy/typing/_scalars.py
@@ -2,22 +2,22 @@ from typing import Union, Tuple, Any
 
 import numpy as np
 
-# NOTE: `_StrLike` and `_BytesLike` are pointless, as `np.str_` and `np.bytes_`
-# are already subclasses of their builtin counterpart
+# NOTE: `_StrLike_co` and `_BytesLike_co` are pointless, as `np.str_` and
+# `np.bytes_` are already subclasses of their builtin counterpart
 
-_CharLike = Union[str, bytes]
+_CharLike_co = Union[str, bytes]
 
-# The 6 `<X>Like` type-aliases below represent all scalars that can be
+# The 6 `<X>Like_co` type-aliases below represent all scalars that can be
 # coerced into `<X>` (with the casting rule `same_kind`)
-_BoolLike = Union[bool, np.bool_]
-_UIntLike = Union[_BoolLike, np.unsignedinteger]
-_IntLike = Union[_BoolLike, int, np.integer]
-_FloatLike = Union[_IntLike, float, np.floating]
-_ComplexLike = Union[_FloatLike, complex, np.complexfloating]
-_TD64Like = Union[_IntLike, np.timedelta64]
+_BoolLike_co = Union[bool, np.bool_]
+_UIntLike_co = Union[_BoolLike_co, np.unsignedinteger]
+_IntLike_co = Union[_BoolLike_co, int, np.integer]
+_FloatLike_co = Union[_IntLike_co, float, np.floating]
+_ComplexLike_co = Union[_FloatLike_co, complex, np.complexfloating]
+_TD64Like_co = Union[_IntLike_co, np.timedelta64]
 
-_NumberLike = Union[int, float, complex, np.number, np.bool_]
-_ScalarLike = Union[
+_NumberLike_co = Union[int, float, complex, np.number, np.bool_]
+_ScalarLike_co = Union[
     int,
     float,
     complex,
@@ -26,5 +26,5 @@ _ScalarLike = Union[
     np.generic,
 ]
 
-# `_VoidLike` is technically not a scalar, but it's close enough
-_VoidLike = Union[Tuple[Any, ...], np.void]
+# `_VoidLike_co` is technically not a scalar, but it's close enough
+_VoidLike_co = Union[Tuple[Any, ...], np.void]