Initial LsPower implementation

.venv/Lib/site-packages/numpy/lib/_array_utils_impl.pyi

@@ -0,0 +1,10 @@
+import numpy as np
+from numpy._core.numeric import normalize_axis_index, normalize_axis_tuple
+
+__all__ = ["byte_bounds", "normalize_axis_tuple", "normalize_axis_index"]
+
+# NOTE: In practice `byte_bounds` can (potentially) take any object
+# implementing the `__array_interface__` protocol. The caveat is
+# that certain keys, marked as optional in the spec, must be present for
+#  `byte_bounds`. This concerns `"strides"` and `"data"`.
+def byte_bounds(a: np.generic | np.ndarray) -> tuple[int, int]: ...