f

API/HTTP.py

@@ -52,12 +52,22 @@ def _resolve_verify_value(verify_ssl: bool) -> Union[bool, str]:
 
     def _try_module_bundle(mod_name: str) -> Optional[str]:
         # Prefer checking sys.modules first (helps test injection / monkeypatching)
-        try:
-            mod = sys.modules.get(mod_name)
-            if mod is None:
-                mod = __import__(mod_name)
-        except (ImportError, ModuleNotFoundError):
-            return None
+        mod = sys.modules.get(mod_name)
+        if mod is None:
+            # Avoid raising ModuleNotFoundError so debuggers and callers aren't interrupted.
+            # Check for module availability before attempting to import it.
+            try:
+                import importlib.util
+
+                spec = importlib.util.find_spec(mod_name)
+                if spec is None:
+                    return None
+                import importlib
+
+                mod = importlib.import_module(mod_name)
+            except Exception:
+                # Treat any import/initialization failure as module not available.
+                return None
 
         # Common APIs that return a bundle path
         for attr in ("where", "get_ca_bundle", "bundle_path", "get_bundle_path", "get_bundle"):