Drop support for Python 3.8

.github/workflows/unittests.yml

@@ -20,7 +20,6 @@ jobs:
         # Basic configurations to run on
         os: ["ubuntu-latest"]
         python-version:
-          - "3.8"
           - "3.9"
           - "3.10"
           - "3.11"

CHANGELOG.md

@@ -16,6 +16,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Removed
 
+- Require at least Python 3.9 (drop support for Python 3.8, [#717](https://github.com/Open-EO/openeo-python-client/issues/717))
+
 ### Fixed
 
 - `metadata_from_stac()` now keeps declared STAC `cube:dimensions` as the dimension source of truth and handles STAC 1.1 common `bands` metadata without requiring the datacube extension ([#743](https://github.com/Open-EO/openeo-python-client/issues/743), [#867](https://github.com/Open-EO/openeo-python-client/pull/867)).

Jenkinsfile

@@ -12,7 +12,7 @@
 pythonPipeline {
   package_name = 'openeo'
   wipeout_workspace = true
-  python_version = ["3.8"]
+  python_version = ["3.11"]
   extras_require = 'tests'
   upload_dev_wheels = false
   wheel_repo = 'python-openeo'

openeo/extra/spectral_indices/spectral_indices.py

@@ -1,4 +1,5 @@
 import functools
+import importlib.resources
 import json
 import re
 from typing import Dict, List, Optional, Set
@@ -8,11 +9,6 @@
 from openeo.processes import ProcessBuilder, array_create, array_modify
 from openeo.rest.datacube import DataCube
 
-try:
-    import importlib_resources
-except ImportError:
-    import importlib.resources as importlib_resources
-
 
 @functools.lru_cache(maxsize=1)
 def load_indices() -> Dict[str, dict]:
@@ -26,7 +22,7 @@ def load_indices() -> Dict[str, dict]:
         #      and provide an alternative mechanism to work with custom indices
         "resources/extra-indices-dict.json",
     ]:
-        resource = importlib_resources.files("openeo.extra.spectral_indices") / path
+        resource = importlib.resources.files("openeo.extra.spectral_indices") / path
         data = json.loads(resource.read_text(encoding="utf8"))
         overwrites = set(specs.keys()).intersection(data["SpectralIndices"].keys())
         if overwrites:
@@ -41,7 +37,7 @@ def load_constants() -> Dict[str, float]:
     """Load constants defined by Awesome Spectral Indices."""
     # TODO: encapsulate all this json loading in a single Awesome Spectral Indices registry class?
     resource = (
-        importlib_resources.files("openeo.extra.spectral_indices") / "resources/awesome-spectral-indices/constants.json"
+        importlib.resources.files("openeo.extra.spectral_indices") / "resources/awesome-spectral-indices/constants.json"
     )
     data = json.loads(resource.read_text(encoding="utf8"))
 
@@ -53,7 +49,7 @@ def _load_bands() -> Dict[str, dict]:
     """Load band name mapping defined by Awesome Spectral Indices."""
     # TODO: encapsulate all this json loading in a single Awesome Spectral Indices registry class?
     resource = (
-        importlib_resources.files("openeo.extra.spectral_indices") / "resources/awesome-spectral-indices/bands.json"
+        importlib.resources.files("openeo.extra.spectral_indices") / "resources/awesome-spectral-indices/bands.json"
     )
     data = json.loads(resource.read_text(encoding="utf8"))
     return data

openeo/metadata.py

@@ -693,9 +693,6 @@ def metadata_from_stac(url: str) -> CubeMetadata:
     parser = _StacMetadataParser()
     return parser.metadata_from_stac_object(stac_object)
 
-# Sniff for PySTAC extension API since version 1.9.0 (which is not available below Python 3.9)
-# TODO: remove this once support for Python 3.7 and 3.8 is dropped
-_PYSTAC_1_9_EXTENSION_INTERFACE = hasattr(pystac.Item, "ext")
 
 # Sniff for PySTAC support for Collection.item_assets (in STAC core since 1.1)
 # (supported since PySTAC 1.12.0, which requires Python>=3.10)
@@ -845,8 +842,7 @@ def _parse_declared_dimensions(self, stac_object: pystac.STACObject, bands: _Ban
         Parse dimensions declared through cube:dimensions.
         """
         if (
-            _PYSTAC_1_9_EXTENSION_INTERFACE
-            and getattr(stac_object, "ext", None) is not None
+            getattr(stac_object, "ext", None) is not None
             and stac_object.ext.has("cube")
             and hasattr(stac_object.ext, "cube")
         ):
@@ -960,7 +956,7 @@ def bands_from_stac_catalog(self, catalog: pystac.Catalog, *, on_empty: str = _O
         summaries = catalog.extra_fields.get("summaries", {})
         self._warn(f"bands_from_stac_catalog with {summaries.keys()=} (which is non-standard)")
         if "eo:bands" in summaries:
-            if _PYSTAC_1_9_EXTENSION_INTERFACE and not catalog.ext.has("eo"):
+            if not catalog.ext.has("eo"):
                 self._warn_undeclared_metadata(field="eo:bands", ext="eo")
             return _BandList(self._band_from_eo_bands_metadata(b) for b in summaries["eo:bands"])
         elif "bands" in summaries:
@@ -985,7 +981,7 @@ def bands_from_stac_collection(
         self._log(f"bands_from_stac_collection with {collection.summaries.lists.keys()=}")
         # Look for band metadata in collection summaries
         if "eo:bands" in collection.summaries.lists:
-            if _PYSTAC_1_9_EXTENSION_INTERFACE and not collection.ext.has("eo"):
+            if not collection.ext.has("eo"):
                 self._warn_undeclared_metadata(field="eo:bands", ext="eo")
             return _BandList(self._band_from_eo_bands_metadata(b) for b in collection.summaries.lists["eo:bands"])
         elif "bands" in collection.summaries.lists:
@@ -998,8 +994,7 @@ def bands_from_stac_collection(
         elif _PYSTAC_1_12_ITEM_ASSETS and collection.item_assets:
             return self._bands_from_item_assets(collection.item_assets)
         elif (
-            _PYSTAC_1_9_EXTENSION_INTERFACE
-            and collection.ext.has("item_assets")
+             collection.ext.has("item_assets")
             and collection.extra_fields.get("item-assets")
             and collection.ext.item_assets
         ):
@@ -1068,10 +1063,10 @@ def bands_from_stac_asset(self, asset: pystac.Asset, *, on_empty: str = _ON_EMPT
         """
         # TODO: "eo:bands" vs "bands" priority based on STAC and EO extension version information
         # TODO: filter on asset roles?
-        if _PYSTAC_1_9_EXTENSION_INTERFACE and asset.owner and asset.ext.has("eo") and asset.ext.eo.bands is not None:
+        if asset.owner and asset.ext.has("eo") and asset.ext.eo.bands is not None:
             return _BandList(self._band_from_eo_bands_metadata(b) for b in asset.ext.eo.bands)
         elif "eo:bands" in asset.extra_fields:
-            if _PYSTAC_1_9_EXTENSION_INTERFACE and asset.owner and not asset.ext.has("eo"):
+            if asset.owner and not asset.ext.has("eo"):
                 self._warn_undeclared_metadata(field="eo:bands", ext="eo")
             return _BandList(self._band_from_eo_bands_metadata(b) for b in asset.extra_fields["eo:bands"])
         elif "bands" in asset.extra_fields:
@@ -1095,7 +1090,7 @@ def _bands_from_item_asset_definition(
         """
         if isinstance(asset, pystac.extensions.item_assets.AssetDefinition):
             if "eo:bands" in asset.properties:
-                if _PYSTAC_1_9_EXTENSION_INTERFACE and asset.owner and not asset.ext.has("eo"):
+                if asset.owner and not asset.ext.has("eo"):
                     self._warn_undeclared_metadata(field="eo:bands", ext="eo")
                 return _BandList(self._band_from_eo_bands_metadata(b) for b in asset.properties["eo:bands"])
             elif "bands" in asset.properties:
@@ -1104,7 +1099,7 @@ def _bands_from_item_asset_definition(
             if "bands" in asset.properties:
                 return _BandList(self._band_from_common_bands_metadata(b) for b in asset.properties["bands"])
             elif "eo:bands" in asset.properties:
-                if _PYSTAC_1_9_EXTENSION_INTERFACE and asset.owner and not asset.ext.has("eo"):
+                if asset.owner and not asset.ext.has("eo"):
                     self._warn_undeclared_metadata(field="eo:bands", ext="eo")
                 return _BandList(self._band_from_eo_bands_metadata(b) for b in asset.properties["eo:bands"])
         else:

openeo/udf/debug.py

@@ -26,5 +26,4 @@ def inspect(data=None, message: str = "", code: str = "User", level: str = "info
     .. seealso:: :ref:`udf_logging_with_inspect`
     """
     extra = {"data": data, "code": code}
-    kwargs = {"stacklevel": 2} if sys.version_info >= (3, 8) else {}
-    _user_log.log(level=logging.getLevelName(level.upper()), msg=message, extra=extra, **kwargs)
+    _user_log.log(level=logging.getLevelName(level.upper()), msg=message, extra=extra, stacklevel=2)

pyproject.toml

@@ -1,5 +1,4 @@
 [build-system]
-# Setuptools 75 is the latest version that works with Python 3.8.
 requires = ["setuptools>=75"]
 build-backend = "setuptools.build_meta"
 
@@ -9,14 +8,13 @@ dynamic = ["version"]
 description = "Client API for openEO"
 readme = "README.md"
 license = { text = "Apache-2.0" }
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 authors = [
     { name = "Jeroen Dries", email = "jeroen.dries@vito.be" },
 ]
 classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Operating System :: OS Independent",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
@@ -26,16 +24,11 @@ classifiers = [
 ]
 dependencies = [
     "deprecated>=1.2.12",
-    # TODO #717 Simplify geopandas constraints when Python 3.8 support is dropped
-    "geopandas",  # Best-effort geopandas dependency for Python 3.8
-    "geopandas>=0.14; python_version>='3.9'",
-    "importlib_resources; python_version<'3.9'",
+    "geopandas>=0.14",
     "numpy>=1.17.0",
     "oschmod>=0.3.12; sys_platform == \"win32\"",
     "pandas>0.20.0,<3.0.0",  # TODO pandas 3 compatibility https://github.com/Open-EO/openeo-python-client/issues/856
-    # TODO #578: pystac 1.5.0 is highest version available for lowest Python
-    # version we still support (3.7).
-    "pystac>=1.5.0",
+    "pystac>=1.9.0",
     "requests>=2.26.0",
     "shapely>=1.6.4",
     "urllib3>=1.9.0",
@@ -49,20 +42,17 @@ artifacts = [
 ]
 dev = [
     "boto3",
-    "boto3~=1.37.38; python_version<'3.9'", # Pin to speed up slow dependency resolution on Python 3.8.
     "botocore",
-    "botocore~=1.37.38; python_version<'3.9'", # Pin to speed up slow dependency resolution on Python 3.8.
     "dirty_equals>=0.8.0",
     "flake8>=5.0.0",
     "httpretty>=1.1.4",
     "mock",
     "moto>=5.0.0",
-    "moto~=5.0.28; python_version<'3.9'", # Pin to speed up slow dependency resolution on Python 3.8.
     "myst-parser",
     "netCDF4>=1.7.0",
     "pyarrow>=10.0.1",
     "pydata_sphinx_theme",
-    "pyproj>=3.2.0",  # Pyproj is an optional, best-effort runtime dependency
+    "pyproj>=3.3.0",  # Pyproj is an optional, best-effort runtime dependency
     "pystac-client>=0.7.5",
     "pytest>=4.5.0",
     "python-dateutil>=2.7.0",
@@ -100,19 +90,15 @@ oschmod = [
 ]
 tests = [
     "boto3",
-    "boto3~=1.37.38; python_version<'3.9'", # Pin to speed up slow dependency resolution on Python 3.8.
     "botocore",
-    "botocore~=1.37.38; python_version<'3.9'", # Pin to speed up slow dependency resolution on Python 3.8.
     "dirty_equals>=0.8.0",
     "flake8>=5.0.0",
     "httpretty>=1.1.4",
     "mock",
     "moto>=5.0.0",
-    # Some pins to speed up slow dependency resolution in Python 3.8 venvs
-    "moto~=5.0.28; python_version<'3.9'", # Pin to speed up slow dependency resolution on Python 3.8.
     "netCDF4>=1.7.0",
     "pyarrow>=10.0.1",  # For Parquet read/write support in pandas
-    "pyproj>=3.2.0",
+    "pyproj>=3.3.0",
     "pystac-client>=0.7.5",
     "pytest>=4.5.0",
     "python-dateutil>=2.7.0",
@@ -140,7 +126,7 @@ version = {attr = "openeo._version.__version__"}
 include = ["openeo*"]
 
 [tool.uv]
-# Version constraints for optionals aren't solvable with older Python versions.
+# Version constraints for some optional dependencies aren't solvable with older Python versions.
 environments = ["python_version >= '3.10'"]
 
 [tool.black]

tests/extra/job_management/test_job_db.py

@@ -268,10 +268,6 @@ def test_initialize_from_df_on_exists_skip(self, tmp_path):
         )
         assert set(db.read()["some_number"]) == {1, 2, 3}
 
-    @pytest.mark.skipif(
-        ComparableVersion(geopandas.__version__) < "0.14",
-        reason="This issue has no workaround with geopandas < 0.14 (highest available version on Python 3.8 is 0.13.2)",
-    )
     def test_read_with_crs_column(self, tmp_path):
         """
         Having a column named "crs" can cause obscure error messages when creating a GeoPandas dataframe

tests/rest/datacube/test_datacube100.py

@@ -193,17 +193,6 @@
 }
 
 
-def _get_normalizable_crs_inputs():
-    """
-    Dynamic (proj version based) generation of supported CRS inputs (to normalize).
-    :return:
-    """
-    yield "EPSG:32631"
-    yield 32631
-    yield "32631"
-    yield "+proj=utm +zone=31 +datum=WGS84 +units=m +no_defs"  # is also EPSG:32631, in proj format
-    yield WKT2_FOR_EPSG23631
-
 
 def _get_leaf_node(cube: DataCube) -> dict:
     """Get leaf node (node with result=True), supporting old and new style of graph building."""
@@ -561,7 +550,18 @@ def test_aggregate_spatial_types(con100: Connection, polygon, expected_geometrie
     }
 
 
-@pytest.mark.parametrize("crs", _get_normalizable_crs_inputs())
+@pytest.mark.parametrize(
+    "crs",
+    [
+        "EPSG:32631",
+        32631,
+        "32631",
+        "+proj=utm +zone=31 +datum=WGS84 +units=m +no_defs",  # is also EPSG:32631, in proj format
+        WKT2_FOR_EPSG23631,
+        PROJJSON_FOR_EPSG23631,
+        json.dumps(PROJJSON_FOR_EPSG23631),
+    ],
+)
 def test_aggregate_spatial_with_crs(con100: Connection, recwarn, crs: str):
     img = con100.load_collection("S2")
     polygon = shapely.geometry.box(0, 0, 1, 1)
@@ -588,36 +588,6 @@ def test_aggregate_spatial_with_crs(con100: Connection, recwarn, crs: str):
     }
 
 
-@pytest.mark.skipif(
-    pyproj.__version__ < ComparableVersion("3.3.0"),
-    reason="PROJJSON format support requires pyproj 3.3.0 or higher",
-)
-@pytest.mark.parametrize("crs", [PROJJSON_FOR_EPSG23631, json.dumps(PROJJSON_FOR_EPSG23631)])
-def test_aggregate_spatial_with_crs_as_projjson(con100: Connection, recwarn, crs):
-    """Separate test coverage for PROJJSON, so we can skip it for Python versions below 3.8"""
-    img = con100.load_collection("S2")
-    polygon = shapely.geometry.box(0, 0, 1, 1)
-    masked = img.aggregate_spatial(geometries=polygon, reducer="mean", crs=crs)
-    warnings = [str(w.message) for w in recwarn]
-    assert f"Geometry with non-Lon-Lat CRS {crs!r} is only supported by specific back-ends." in warnings
-    assert sorted(masked.flat_graph().keys()) == ["aggregatespatial1", "loadcollection1"]
-    assert masked.flat_graph()["aggregatespatial1"] == {
-        "process_id": "aggregate_spatial",
-        "arguments": {
-            "data": {"from_node": "loadcollection1"},
-            "geometries": {
-                "type": "Polygon",
-                "coordinates": (((1.0, 0.0), (1.0, 1.0), (0.0, 1.0), (0.0, 0.0), (1.0, 0.0)),),
-                "crs": {"properties": {"name": "EPSG:32631"}, "type": "name"},
-            },
-            "reducer": {
-                "process_graph": {
-                    "mean1": {"process_id": "mean", "arguments": {"data": {"from_parameter": "data"}}, "result": True}
-                }
-            },
-        },
-        "result": True,
-    }
 
 
 @pytest.mark.parametrize(
@@ -906,7 +876,18 @@ def test_mask_polygon_types(con100: Connection, polygon, expected_mask):
     }
 
 
-@pytest.mark.parametrize("crs", _get_normalizable_crs_inputs())
+@pytest.mark.parametrize(
+    "crs",
+    [
+        "EPSG:32631",
+        32631,
+        "32631",
+        "+proj=utm +zone=31 +datum=WGS84 +units=m +no_defs",  # is also EPSG:32631, in proj format
+        WKT2_FOR_EPSG23631,
+        PROJJSON_FOR_EPSG23631,
+        json.dumps(PROJJSON_FOR_EPSG23631),
+    ],
+)
 def test_mask_polygon_with_crs(con100: Connection, recwarn, crs: str):
     img = con100.load_collection("S2")
     polygon = shapely.geometry.box(0, 0, 1, 1)
@@ -929,33 +910,6 @@ def test_mask_polygon_with_crs(con100: Connection, recwarn, crs: str):
     }
 
 
-@pytest.mark.skipif(
-    pyproj.__version__ < ComparableVersion("3.3.0"),
-    reason="PROJJSON format support requires pyproj 3.3.0 or higher",
-)
-@pytest.mark.parametrize("crs", [PROJJSON_FOR_EPSG23631, json.dumps(PROJJSON_FOR_EPSG23631)])
-def test_mask_polygon_with_crs_as_projjson(con100: Connection, recwarn, crs):
-    """Separate test coverage for PROJJSON, so we can skip it for Python versions below 3.8"""
-    img = con100.load_collection("S2")
-    polygon = shapely.geometry.box(0, 0, 1, 1)
-    masked = img.mask_polygon(mask=polygon, srs=crs)
-    warnings = [str(w.message) for w in recwarn]
-    assert f"Geometry with non-Lon-Lat CRS {crs!r} is only supported by specific back-ends." in warnings
-    assert sorted(masked.flat_graph().keys()) == ["loadcollection1", "maskpolygon1"]
-    assert masked.flat_graph()["maskpolygon1"] == {
-        "process_id": "mask_polygon",
-        "arguments": {
-            "data": {"from_node": "loadcollection1"},
-            "mask": {
-                "type": "Polygon",
-                "coordinates": (((1.0, 0.0), (1.0, 1.0), (0.0, 1.0), (0.0, 0.0), (1.0, 0.0)),),
-                # All listed test inputs for crs should be converted to "EPSG:32631"
-                "crs": {"type": "name", "properties": {"name": "EPSG:32631"}},
-            },
-        },
-        "result": True,
-    }
-
 
 def test_mask_polygon_parameter(con100: Connection):
     img = con100.load_collection("S2")