Start simple

.github/python.json

@@ -4,11 +4,9 @@
             "owner": "python",
             "pattern": [
                 {
-                    "regexp": "^\\s*File\\s\\\"(.*)\\\",\\sline\\s(\\d+),\\sin\\s(.*)\\s*raise\\s(.*)\\(\\'(.*)\\'\\)\\s*(.*)\\:\\s.*$",
-                    "file": 1,
-                    "line": 2,
-                    "severity": 4,
-                    "message": 5
+                    "regexp": "^\s*raise\s(.*)\(\'(.*)\'\)$",
+                    "severity": 1,
+                    "message": 2
                 }
             ]
         }