1 files changed, 34 insertions, 0 deletions
diff --git a/numpy/typing/_array_like.py b/numpy/typing/_array_like.py
new file mode 100644
index 000000000..76c0c839c
--- /dev/null
+++ b/numpy/typing/_array_like.py
@@ -0,0 +1,34 @@
+import sys
+from typing import Any, overload, Sequence, TYPE_CHECKING, Union
+
+from numpy import ndarray
+from ._dtype_like import DtypeLike
+
+if sys.version_info >= (3, 8):
+    from typing import Protocol
+    HAVE_PROTOCOL = True
+else:
+    try:
+        from typing_extensions import Protocol
+    except ImportError:
+        HAVE_PROTOCOL = False
+    else:
+        HAVE_PROTOCOL = True
+
+if TYPE_CHECKING or HAVE_PROTOCOL:
+    class _SupportsArray(Protocol):
+        @overload
+        def __array__(self, __dtype: DtypeLike = ...) -> ndarray: ...
+        @overload
+        def __array__(self, dtype: DtypeLike = ...) -> ndarray: ...
+else:
+    _SupportsArray = Any
+
+# TODO: support buffer protocols once
+#
+# https://bugs.python.org/issue27501
+#
+# is resolved. See also the mypy issue:
+#
+# https://github.com/python/typing/issues/593
+ArrayLike = Union[bool, int, float, complex, _SupportsArray, Sequence]