Index: Lib/pdb.py
===================================================================
--- Lib/pdb.py	(revision 59828)
+++ Lib/pdb.py	(working copy)
@@ -193,7 +193,15 @@
         globals = self.curframe.f_globals
         try:
             code = compile(line + '\n', '<stdin>', 'single')
-            exec code in globals, locals
+            save_stdin = sys.stdin
+            save_stdout = sys.stdout
+            try:
+                sys.stdin = self.stdin
+                sys.stdout = self.stdout
+                exec code in globals, locals
+            finally:
+                sys.stdout = save_stdout
+                sys.stdin = save_stdin
         except:
             t, v = sys.exc_info()[:2]
             if type(t) == type(''):