Refactor resampler module to submodules

satpy/resample/__init__.py

@@ -0,0 +1,66 @@
+# Copyright (c) 2015-2025 Satpy developers
+#
+# This file is part of satpy.
+#
+# satpy is free software: you can redistribute it and/or modify it under the
+# terms of the GNU General Public License as published by the Free Software
+# Foundation, either version 3 of the License, or (at your option) any later
+# version.
+#
+# satpy is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+# A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# satpy.  If not, see <http://www.gnu.org/licenses/>.
+"""Writers subpackage."""
+from __future__ import annotations
+
+import warnings
+from typing import Any
+
+
+def __getattr__(name: str) -> Any:
+    if name in ("KDTreeResampler", "BilinearResampler"):
+        from . import kdtree
+
+        new_submod = "kdtree"
+        obj = getattr(kdtree, name)
+    elif name == "NativeResampler":
+        from .native import NativeResampler
+        new_submod = "native"
+        obj = NativeResampler
+    elif name in (
+            "BucketResamplerBase",
+            "BucketAvg",
+            "BucketSum",
+            "BucketCount",
+            "BucketFraction"
+    ):
+        from . import bucket
+        new_submod = "bucket"
+        obj = getattr(bucket, name)
+    elif name in (
+            "hash_dict",
+            "get_area_file",
+            "get_area_def",
+            "add_xy_coords",
+            "add_crs_xy_coords",
+            "update_resampled_coords",
+            "resample",
+            "prepare_resampler",
+            "get_fill_value",
+            "resample_dataset"
+    ):
+            from . import base
+            new_submod = "base"
+            obj = getattr(base, name)
+    else:
+        raise AttributeError(f"module '{__name__}' has no attribute '{name}'")
+
+    warnings.warn(
+        f"'satpy.resample.{name}' has been moved to 'satpy.resample.{new_submod}.{name}'. "
+        f"Import from the new location instead (ex. 'from satpy.resample.{new_submod} import {name}').",
+        stacklevel=2,
+    )
+    return obj