(COOKED): Removed.

(_saved_mode): New variable.
(_save): New function.  Arrange to call _restore via the atexit module.
(_restore): New function.
(user.__init__): Default to not modifying the termios setting.
	Call _save before changing them.
(user.close): Use _restore to restore the settings.

pcl_expect/user.py

+import atexit
 import sys
 import tty
 import termios
@@ -8,25 +9,42 @@ __all__ = [
     "user",
     "RAW",
     "CBREAK",
-    "COOKED",
     ]
 
 RAW = 0
 CBREAK = 1
-COOKED = 2
+
+_saved_mode = None
+
+def _save():
+    global _saved_mode
+
+    if _saved_mode is None:
+        _saved_mode = termios.tcgetattr(sys.stdin.fileno())
+
+    atexit.register(_restore)
+
+def _restore():
+    global _saved_mode
+
+    if _saved_mode is not None:
+        termios.tcsetattr(sys.stdin.fileno(), termios.TCSAFLUSH, _saved_mode)
+        _saved_mode = None
+
+        
 
 class user(pcl_expect.expectable):
-    def __init__(self, mode = CBREAK):
+    def __init__(self, mode = None):
+
         fd = sys.stdin.fileno()
-        self.__mode = termios.tcgetattr(fd)
-        if mode == COOKED:
-            # Let's hope the fd already is in cooked mode...
-            pass
-        elif mode == CBREAK:
+
+        if mode == CBREAK:
+            _save()
             tty.setcbreak(fd)
         elif mode == RAW:
+            _save()
             tty.setraw(fd)
-        else:
+        elif mode != None:
             raise pcl_expect.BadArgs()
 
         pcl_expect.expectable.__init__(self, fd)
@@ -36,4 +54,5 @@ class user(pcl_expect.expectable):
         sys.stdout.flush()
 
     def close(self):
-        termios.tcsetattr(self.fileno(), termios.TCSAFLUSH, self.__mode)
+        pcl_expect.expectable.close(self)
+        _restore()