--- contrib/python/iniconfig/iniconfig/__init__.py	(index)
+++ contrib/python/iniconfig/iniconfig/__init__.py	(working tree)
@@ -114,8 +114,16 @@ class IniConfig:
     ) -> None:
         self.path = os.fspath(path)
         if data is None:
-            with open(self.path, encoding=encoding) as fp:
-                data = fp.read()
+            if os.path.basename(self.path).startswith('pkg:'):
+                import pkgutil
+
+                basename = os.path.basename(self.path)
+                _, package, resource = basename.split(':')
+                content = pkgutil.get_data(package, resource)
+                data = content.decode('utf-8')
+            else:
+                with open(self.path, encoding=encoding) as fp:
+                    data = fp.read()
 
         tokens = _parse.parse_lines(self.path, data.splitlines(True))