1 files changed, 45 insertions, 1 deletions
diff --git a/Lib/curses/__init__.py b/Lib/curses/__init__.py
index 303ea3e..61ce443 100644
--- a/Lib/curses/__init__.py
+++ b/Lib/curses/__init__.py
@@ -11,7 +11,6 @@ the package, and perhaps a particular module inside it.
 """
 
 from _curses import *
-from curses.wrapper import wrapper
 import os as _os
 import sys as _sys
 
@@ -55,3 +54,48 @@ try:
     has_key
 except NameError:
     from has_key import has_key
+
+# Wrapper for the entire curses-based application.  Runs a function which
+# should be the rest of your curses-based application.  If the application
+# raises an exception, wrapper() will restore the terminal to a sane state so
+# you can read the resulting traceback.
+
+def wrapper(func, *args, **kwds):
+    """Wrapper function that initializes curses and calls another function,
+    restoring normal keyboard/screen behavior on error.
+    The callable object 'func' is then passed the main window 'stdscr'
+    as its first argument, followed by any other arguments passed to
+    wrapper().
+    """
+
+    try:
+        # Initialize curses
+        stdscr = initscr()
+
+        # Turn off echoing of keys, and enter cbreak mode,
+        # where no buffering is performed on keyboard input
+        noecho()
+        cbreak()
+
+        # In keypad mode, escape sequences for special keys
+        # (like the cursor keys) will be interpreted and
+        # a special value like curses.KEY_LEFT will be returned
+        stdscr.keypad(1)
+
+        # Start color, too.  Harmless if the terminal doesn't have
+        # color; user can test with has_color() later on.  The try/catch
+        # works around a minor bit of over-conscientiousness in the curses
+        # module -- the error return from C start_color() is ignorable.
+        try:
+            start_color()
+        except:
+            pass
+
+        return func(stdscr, *args, **kwds)
+    finally:
+        # Set everything back to normal
+        if 'stdscr' in locals():
+            stdscr.keypad(0)
+            echo()
+            nocbreak()
+            endwin()