replaced deprecated pkg_resources with importlib.metadata-based approach (based on: https://packaging.python.org/en/latest/guides/creating-and-discovering-plugins/#using-package-metadata); prepared for release

Author: fracpete

CHANGES.rst

@@ -1,6 +1,13 @@
 Changelog
 =========
 
+0.2.17 (2025-06-26)
+-------------------
+
+- replaced deprecated `pkg_resources` with `importlib.metadata`-based approach
+  (based on: https://packaging.python.org/en/latest/guides/creating-and-discovering-plugins/#using-package-metadata)
+
+
 0.2.16 (2025-04-08)
 -------------------
 

setup.py

@@ -33,7 +33,7 @@ def _read(f):
     install_requires=[
         "setuptools",
     ],
-    version="0.2.16",
+    version="0.2.17",
     author='Peter Reutemann',
     author_email='fracpete@waikato.ac.nz',
     entry_points={

src/seppl/_class_registry.py

@@ -5,7 +5,10 @@
 import traceback
 from typing import Callable, Union, List, Optional, Type, Dict
 
-from pkg_resources import working_set
+if sys.version_info < (3, 10):
+    from importlib_metadata import entry_points
+else:
+    from importlib.metadata import entry_points
 
 from ._types import get_class_name, get_class
 from ._plugin import Plugin, get_all_names, get_aliases
@@ -369,13 +372,8 @@ def _determine_from_entry_points(self, c: str) -> List[str]:
         """
         result = []
         class_listers = []
-        for item in working_set.iter_entry_points("class_lister", None):
-            if len(item.attrs) > 0:
-                # format: "name=module:function"
-                class_listers.append(item.module_name + ":" + item.attrs[0])
-            else:
-                # format: "name=module"
-                class_listers.append(item.module_name)
+        for item in entry_points(group="class_lister"):
+            class_listers.append(item.value)
         if len(class_listers) > 0:
             result = self._determine_from_class_listers(c, class_listers)
         return result

src/seppl/_registry.py

@@ -5,7 +5,10 @@
 import traceback
 
 from typing import List, Union, Optional, Dict
-from pkg_resources import working_set
+if sys.version_info < (3, 10):
+    from importlib_metadata import entry_points
+else:
+    from importlib.metadata import entry_points
 
 from ._plugin import get_all_names, get_aliases, Plugin
 from ._types import get_class, get_class_name
@@ -432,10 +435,11 @@ def _register_from_entry_point(self, group: str, c: Optional = None) -> Dict[str
         c = self._init_plugin_class(c)
         result = dict()
 
-        for item in working_set.iter_entry_points(group, None):
+        for item in entry_points(group=group):
             # format: "plugin_name=plugin_module:plugin_class",
             if self.mode == MODE_EXPLICIT:
-                cls = get_class(module_name=item.module_name, class_name=item.attrs[0])
+                module_name, class_name = item.value.split(":")
+                cls = get_class(module_name=module_name, class_name=class_name)
                 if issubclass(cls, c):
                     p = cls()
                     if self._register_plugin(result, p):
@@ -446,8 +450,9 @@ def _register_from_entry_point(self, group: str, c: Optional = None) -> Dict[str
                         self._all_aliases.update(get_aliases(p))
             # format: "unique_string=plugin_module:superclass_name",
             elif self.mode == MODE_DYNAMIC:
-                c = get_class(full_class_name=".".join(item.attrs))
-                result.update(self._register_from_module(item.module_name, c))
+                module_name, class_name = item.value.split(":")
+                c = get_class(full_class_name=class_name)
+                result.update(self._register_from_module(module_name, c))
             else:
                 raise Exception("Unhandled mode: %s" % self.mode)