pythongh-127146: Allow ignored keys to be missing in test_sysconfig (python#135622)

hoodmane · Pranjal095 · commit 9c4c300ba6a3 · 2025-07-12T20:33:17.000+05:30
Fixes the test on Emscripten where userbase can be missing.
diff --git a/Lib/test/test_sysconfig.py b/Lib/test/test_sysconfig.py
@@ -711,8 +711,8 @@ def test_sysconfigdata_json(self):
             ignore_keys |= {'prefix', 'exec_prefix', 'base', 'platbase', 'installed_base', 'installed_platbase'}
 
         for key in ignore_keys:
-            json_config_vars.pop(key)
-            system_config_vars.pop(key)
+            json_config_vars.pop(key, None)
+            system_config_vars.pop(key, None)
 
         self.assertEqual(system_config_vars, json_config_vars)
 
