- Require AppStream to validate appdata file instead of deprecated

appstream-glib.
- Update idle3.appdata.xml to pass the more pedantic appstreamcli.

OBS-URL: https://build.opensuse.org/package/show/devel:languages:python:Factory/python311?expand=0&rev=194

import_failed.py

@@ -0,0 +1,23 @@
+import sys, os
+from sysconfig import get_path
+
+failed_map_path = os.path.join(get_path('stdlib'), '_import_failed', 'import_failed.map')
+
+if __spec__:
+    failed_name = __spec__.name
+else:
+    failed_name = __name__
+
+with open(failed_map_path) as fd:
+    for line in fd:
+        package = line.split(':')[0]
+        imports = line.split(':')[1]
+        if failed_name in imports:
+            raise ImportError(f"""Module '{failed_name}' is not installed.
+Use:
+  sudo zypper install {package}
+to install it.""")
+
+raise ImportError(f"""Module '{failed_name}' is not installed.
+It is supposed to be part of python3 distribution, but missing from failed import map.
+Please file a bug on the SUSE Bugzilla.""")