Add a suggestion from chgnrdv

Author: Eclips4

Lib/pydoc.py

@@ -1781,10 +1781,10 @@ def doc(thing, title='Python Library Documentation: %s', forceload=0,
     if output is None:
         try:
             pager(render_doc(thing, title, forceload))
-        except ImportError:
+        except ImportError as exc:
             if is_cli:
-                raise ImportError(missing_pattern % thing) from None
-            pager(missing_pattern % thing)
+                raise
+            print(exc)
     else:
         output.write(render_doc(thing, title, forceload, plaintext))