Fix build against Python 3.12

Ever since Python 3.2, configparser.SafeConfigParser has been deprecated
in favor of configparser.ConfigParser. An alias existed for backward
compatibility but the alias was dropped from Python 3.12.

Let us now use ConfigParser explicitly, and use .read_file() instead of
.readfp() which was dropped too.

The imp module has also been dropped, but a similar behavior can be achieved
using importlib.

Signed-off-by: Olivier Gayot <[email protected]>

tests/test_sandbox_scripts.py

@@ -42,7 +42,7 @@
 from io import StringIO
 import traceback
 import glob
-import imp
+import importlib
 
 import pytest
 
@@ -77,7 +77,8 @@ def _sandbox_scripts():
 @pytest.mark.parametrize("filename", _sandbox_scripts())
 def test_import_succeeds(filename, tmpdir, capsys):
     try:
-        mod = imp.load_source('__zzz', filename)
+        loader = importlib.machinery.SourceFileLoader('__zzz', filename)
+        mod = loader.load_module()
     except:
         print(traceback.format_exc())
         raise AssertionError("%s cannot be imported" % (filename,))

versioneer.py

@@ -339,9 +339,9 @@ def get_config_from_root(root):
     # configparser.NoOptionError (if it lacks "VCS="). See the docstring at
     # the top of versioneer.py for instructions on writing your setup.cfg .
     setup_cfg = os.path.join(root, "setup.cfg")
-    parser = configparser.SafeConfigParser()
+    parser = configparser.ConfigParser()
     with open(setup_cfg, "r") as f:
-        parser.readfp(f)
+        parser.read_file(f)
     VCS = parser.get("versioneer", "VCS")  # mandatory
 
     def get(parser, name):