drop support for python 3.8

.github/workflows/test.yml

@@ -24,7 +24,7 @@ jobs:
 
       matrix:
         os: [ubuntu-latest]
-        python-version: ["3.8", "3.12"]
+        python-version: ["3.9", "3.12"]
 
     defaults:
       run:
@@ -107,7 +107,7 @@ jobs:
 
       matrix:
         os: [macos-latest, windows-latest]
-        python-version: ["3.8", "3.12"]
+        python-version: ["3.9", "3.12"]
 
     defaults:
       run:

docs/get-started.rst

@@ -15,7 +15,7 @@ to create a new environment containing all dependencies and Terracotta:
 
    $ conda env create -f environment.yml
 
-If you already have Python 3.8 (or above) installed, you can just run
+If you already have Python 3.9 (or above) installed, you can just run
 
 .. code-block:: bash
 

docs/index.rst

@@ -23,7 +23,7 @@ Try out a live demo `here <https://terracotta-demo-frontend.orangebeach-11aa4896
 Installation
 ------------
 
-If you are using Linux and already have Python 3.8+ installed, all you need to
+If you are using Linux and already have Python 3.9+ installed, all you need to
 do to check out Terracotta is
 
 .. code-block:: bash

environment.yml

@@ -3,7 +3,7 @@ channels:
   - conda-forge
   - nodefaults
 dependencies:
-  - python>=3.8
+  - python>=3.9
   - numpy
   - rasterio>=1.3.0
   - shapely

setup.py

@@ -38,7 +38,6 @@
         "Development Status :: 4 - Beta",
         "Intended Audience :: End Users/Desktop",
         "License :: OSI Approved :: MIT License",
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
@@ -54,7 +53,7 @@
     ],
     # module
     packages=find_packages(exclude=["docs", "tests"]),
-    python_requires=">=3.8",
+    python_requires=">=3.9",
     use_scm_version={"write_to": "terracotta/_version.py"},
     # dependencies
     setup_requires=[
@@ -70,7 +69,6 @@
         "click-spinner",
         "flask",
         "flask_cors",
-        "importlib_resources; python_version<'3.9'",
         "marshmallow>=3.0.0",
         "mercantile",
         "numpy%s" % numpy_version,

terracotta/cmaps/get_cmaps.py

@@ -3,22 +3,17 @@
 Define an interface to retrieve stored color maps.
 """
 
+import importlib.resources
 from typing import Dict
 import os
 import numpy as np
-import sys
-
-if sys.version_info >= (3, 9):
-    import importlib.resources as importlib_resources
-else:
-    import importlib_resources
 
 
 SUFFIX = "_rgba.npy"
 EXTRA_CMAP_FOLDER = os.environ.get("TC_EXTRA_CMAP_FOLDER", "")
 
 try:
-    PACKAGE_DIR = str(importlib_resources.files("terracotta") / "cmaps/data")
+    PACKAGE_DIR = str(importlib.resources.files("terracotta") / "cmaps/data")
 except ModuleNotFoundError:
     # terracotta was not installed, fall back to file system
     PACKAGE_DIR = os.path.join(os.path.dirname(__file__), "data")

tests/cmaps/test_get_cmap.py

@@ -1,12 +1,6 @@
 import pytest
 
 import numpy as np
-import sys
-
-if sys.version_info >= (3, 9):
-    import importlib.resources as importlib_resources
-else:
-    import importlib_resources
 
 
 @pytest.fixture(autouse=True)
@@ -31,17 +25,21 @@ def test_get_cmap():
 
 def test_get_cmap_filesystem(monkeypatch):
     import importlib
+    import importlib.resources
 
     import terracotta.cmaps.get_cmaps
 
     def throw_error(*args, **kwargs):
-        raise ModuleNotFoundError
+        raise ModuleNotFoundError("monkeypatched")
 
     with monkeypatch.context() as m:
-        m.setattr(importlib_resources, "files", throw_error)
+        m.setattr(importlib.resources, "files", throw_error)
+
+        with pytest.raises(ModuleNotFoundError) as exc_info:
+            importlib.resources.files("terracotta")
 
-        with pytest.raises(ModuleNotFoundError):
-            importlib_resources.files("terracotta")
+        (msg,) = exc_info.value.args
+        assert msg == "monkeypatched"
 
         importlib.reload(terracotta.cmaps.get_cmaps)