import normalize_axis_index from numpy.lib on numpy>=2 (#364)

* import `normalize_axis_index` from `numpy.lib` on `numpy>=2`

* import the right thing

flox/xrutils.py

@@ -8,7 +8,6 @@
 
 import numpy as np
 import pandas as pd
-from numpy.core.multiarray import normalize_axis_index  # type: ignore[attr-defined]
 from packaging.version import Version
 
 try:
@@ -25,6 +24,37 @@
     dask_array_type = ()  # type: ignore[assignment, misc]
 
 
+def module_available(module: str, minversion: Optional[str] = None) -> bool:
+    """Checks whether a module is installed without importing it.
+
+    Use this for a lightweight check and lazy imports.
+
+    Parameters
+    ----------
+    module : str
+        Name of the module.
+
+    Returns
+    -------
+    available : bool
+        Whether the module is installed.
+    """
+    has = importlib.util.find_spec(module) is not None
+    if has:
+        mod = importlib.import_module(module)
+        return Version(mod.__version__) >= Version(minversion) if minversion is not None else True
+    else:
+        return False
+
+
+if module_available("numpy", minversion="2.0.0"):
+    from numpy.lib.array_utils import (  # type: ignore[import-not-found]
+        normalize_axis_index,
+    )
+else:
+    from numpy.core.numeric import normalize_axis_index  # type: ignore[attr-defined]
+
+
 def asarray(data, xp=np):
     return data if is_duck_array(data) else xp.asarray(data)
 
@@ -349,26 +379,3 @@ def nanlast(values, axis, keepdims=False):
         return np.expand_dims(result, axis=axis)
     else:
         return result
-
-
-def module_available(module: str, minversion: Optional[str] = None) -> bool:
-    """Checks whether a module is installed without importing it.
-
-    Use this for a lightweight check and lazy imports.
-
-    Parameters
-    ----------
-    module : str
-        Name of the module.
-
-    Returns
-    -------
-    available : bool
-        Whether the module is installed.
-    """
-    has = importlib.util.find_spec(module) is not None
-    if has:
-        mod = importlib.import_module(module)
-        return Version(mod.__version__) >= Version(minversion) if minversion is not None else True
-    else:
-        return False