Fix load_module deprecation warnings for Python >= 3.10.

CHANGES.rst

@@ -3,7 +3,7 @@ Changes
 
 In next release ...
 
-- ...
+- Fix ``load_module`` deprecation warnings for Python >= 3.10.
 
 4.5.4 (2024-04-08)
 ------------------

src/chameleon/loader.py

@@ -12,6 +12,8 @@
 import tempfile
 import warnings
 from importlib.machinery import SourceFileLoader
+from importlib.util import module_from_spec
+from importlib.util import spec_from_loader
 from threading import RLock
 from typing import TYPE_CHECKING
 from typing import Any
@@ -222,7 +224,13 @@ def _load(self, base: str, filename: str) -> dict[str, Any]:
         try:
             module = sys.modules.get(base)
             if module is None:
-                module = SourceFileLoader(base, filename).load_module()
+                loader = SourceFileLoader(base, filename)
+                spec = spec_from_loader(base, loader)
+                if spec is None:
+                    raise ModuleNotFoundError(f"{base} ({filename})")
+                module = module_from_spec(spec)
+                loader.exec_module(module)
+                sys.modules[base] = module
         finally:
             release_lock()
 

src/chameleon/tests/test_loader.py

@@ -3,6 +3,7 @@
 import tempfile
 import unittest
 import zipimport
+from importlib.util import module_from_spec
 from pathlib import Path
 
 
@@ -110,7 +111,13 @@ def _test_load_package(self, command, pkg_extension):
             (package_path,) = basedir.glob('dist/*' + pkg_extension)
 
             importer = zipimport.zipimporter(str(package_path))
-            importer.load_module(pkg_name)
+            if hasattr(importer, 'find_spec'):
+                spec = importer.find_spec(pkg_name)
+                module = module_from_spec(spec)
+                importer.exec_module(module)
+                sys.modules[pkg_name] = module
+            else:
+                importer.load_module(pkg_name)
 
             try:
                 self._test_pkg(pkg_name)
@@ -170,6 +177,7 @@ def test_build(self):
         source = "def function(): return %r" % "\xc3\xa6\xc3\xb8\xc3\xa5"
 
         module = loader.build(source, "test.xml")
+        self.assertIn('test', sys.modules)
         result1 = module['function']()
         d = {}
         code = compile(source, 'test.py', 'exec')

tox.ini

@@ -23,7 +23,7 @@ deps =
     pytest
     setuptools
 commands =
-    pytest --doctest-modules
+    pytest --doctest-modules -W error:"the load_module":DeprecationWarning -W error:"zipimport.zipimporter.load_module":DeprecationWarning {posargs}
 extras =
     test
 setenv =