Use new Python 3.13+ classifiers

Author: gpotter2

pyproject.toml

@@ -14,7 +14,7 @@ maintainers = [
     { name="Guillaume VALADON" },
     { name="Nils WEISS" },
 ]
-license = { text="GPL-2.0-only" }
+license = "GPL-2.0-only"
 requires-python = ">=3.7, <4"
 description = "Scapy: interactive packet manipulation tool"
 keywords = [ "network" ]
@@ -26,7 +26,6 @@ classifiers = [
     "Intended Audience :: Science/Research",
     "Intended Audience :: System Administrators",
     "Intended Audience :: Telecommunications Industry",
-    "License :: OSI Approved :: GNU General Public License v2 (GPLv2)",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3 :: Only",
     "Programming Language :: Python :: 3.7",

scapy/config.py

@@ -587,10 +587,10 @@ def __repr__(self):
 class ExtsManager(importlib.abc.MetaPathFinder):
     __slots__ = ["exts", "_loaded", "all_specs"]
 
-    SCAPY_PLUGIN_CLASSIFIER = 'Framework :: Scapy'
-    GPLV2_CLASSIFIERS = [
-        'License :: OSI Approved :: GNU General Public License v2 (GPLv2)',
-        'License :: OSI Approved :: GNU General Public License v2 or later (GPLv2+)',
+    SCAPY_PLUGIN_CLASSIFIER = "Framework :: Scapy Plugin"
+    ALLOWED_LICENCES = [
+        "GPL-2.0-only",
+        "GPL-2.0-or-later",
     ]
 
     def __init__(self):
@@ -639,8 +639,8 @@ def load(self):
                 if pkg in self._loaded:
                     continue
                 if not any(
-                    v in self.GPLV2_CLASSIFIERS
-                    for k, v in distr.metadata.items() if k == 'Classifier'
+                    v in self.ALLOWED_LICENCES
+                    for k, v in distr.metadata.items() if k == 'License-Expression'
                 ):
                     log_loading.warning(
                         "'%s' has no GPLv2 classifier therefore cannot be loaded." % pkg  # noqa: E501