diff -r abbbe1f90635 Lib/idlelib/PyShell.py
--- a/Lib/idlelib/PyShell.py	Sun Mar 31 01:11:26 2013 -0500
+++ b/Lib/idlelib/PyShell.py	Sun Mar 31 12:15:05 2013 -0500
@@ -1354,6 +1354,10 @@
         self._line_buffer = line[size:]
         return line[:size]
 
+    def close(self):
+        # site.py's exit() and quit() calls sys.stdin.close()
+        self.shell.close()
+
 
 usage_msg = """\
 
diff -r abbbe1f90635 Lib/site.py
--- a/Lib/site.py	Sun Mar 31 01:11:26 2013 -0500
+++ b/Lib/site.py	Sun Mar 31 12:15:05 2013 -0500
@@ -349,15 +349,20 @@
         def __call__(self, code=None):
             # Shells like IDLE catch the SystemExit, but listen when their
             # stdin wrapper is closed.
-            try:
-                fd = -1
-                if hasattr(sys.stdin, "fileno"):
+            fd = -1
+            if hasattr(sys.stdin, "fileno"):
+                try:
                     fd = sys.stdin.fileno()
-                if fd != 0:
-                    # Don't close stdin if it wraps fd 0
+                except IOError:
+                    pass
+
+            if fd != 0:
+                # Don't close stdin if it wraps fd 0
+                try:
                     sys.stdin.close()
-            except:
-                pass
+                except:
+                    pass
+
             raise SystemExit(code)
     builtins.quit = Quitter('quit')
     builtins.exit = Quitter('exit')