refactor: move odc-geo import to top, add test for missing odc-geo.

pyresample/geometry.py

@@ -56,6 +56,11 @@
 except ImportError:
     da = None
 
+try:
+    import odc.geo as odc_geo
+except ModuleNotFoundError:
+    odc_geo = None
+
 from pyproj import CRS
 from pyproj.enums import TransformDirection
 
@@ -1977,14 +1982,12 @@ def to_odc_geobox(self):
 
         See: https://odc-geo.readthedocs.io/en/latest/
         """
-        try:
-            from odc.geo import Resolution
-            from odc.geo.geobox import GeoBox
-        except ModuleNotFoundError:
+        if odc_geo is None:
             raise ModuleNotFoundError("Please install 'odc-geo' to use this method.")
 
-        return GeoBox.from_bbox(bbox=self.area_extent, crs=self.crs,
-                                resolution=Resolution(x=self.pixel_size_x, y=-self.pixel_size_y), tight=True)
+        return odc_geo.geobox.GeoBox.from_bbox(bbox=self.area_extent, crs=self.crs,
+                                               resolution=odc_geo.Resolution(x=self.pixel_size_x, y=-self.pixel_size_y),
+                                               tight=True)
 
     def create_areas_def(self):
         """Generate YAML formatted representation of this area.

pyresample/test/test_geometry/test_area.py

@@ -403,6 +403,16 @@ def test_cartopy_crs_latlon_bounds(self, create_test_area):
         latlong_crs = area_def.to_cartopy_crs()
         np.testing.assert_allclose(latlong_crs.bounds, [-180, 180, -90, 90])
 
+    def test_to_odc_geobox_odc_missing(self, monkeypatch, stere_area):
+        """Test odc-geo not installed."""
+        area = stere_area
+
+        with monkeypatch.context() as m:
+            m.setattr(pyresample.geometry, "odc_geo", None)
+
+            with pytest.raises(ModuleNotFoundError):
+                area.to_odc_geobox()
+
     def test_to_odc_geobox(self, stere_area, create_test_area):
         """Test conversion from area definition to odc GeoBox."""
         from odc.geo.geobox import GeoBox