Another numpy 2 fix (#377)

Co-authored-by: David Huard <[email protected]>

Author: aulemahal

CHANGES.rst

@@ -1,6 +1,10 @@
 What's new
 ==========
 
+0.8.7 (unreleased)
+------------------
+* Cast grid sizes to python's int (another Numpy 2.0 fix). (:pull:`377`) By `Pascal Bourgault <https://github.com/aulemahal>`_.
+
 0.8.6 (2024-06-26)
 ------------------
 * New ``xe.util.cell_area`` utility to compute the cell area using ESMF's internal mechanism. (:pull:`372`, :issue:`369`) By `Jiawei Zhuang <https://github.com/JiaweiZhuang>`_  and `Pascal Bourgault <https://github.com/aulemahal>`_.

xesmf/backend.py

@@ -146,7 +146,8 @@ def from_xarray(cls, lon, lat, periodic=False, mask=None):
 
     def get_shape(self, loc=ESMF.StaggerLoc.CENTER):
         """Return shape of grid for specified StaggerLoc"""
-        return tuple(self.size[loc])
+        # We cast explicitly to python's int (numpy >=2)
+        return tuple(map(int, self.size[loc]))
 
 
 class LocStream(ESMF.LocStream):