cpython/Lib/curses/wrapper.py

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"""curses.wrapper
Contains one function, wrapper(), which runs another 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.
"""
import curses
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def wrapper(func, *args, **kwds):
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"""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().
"""
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try:
# Initialize curses
Merged revisions 83536,83546-83548,83550,83554-83555,83558,83563,83565,83571,83574-83575 via svnmerge from svn+ssh://pythondev@svn.python.org/python/branches/py3k ........ r83536 | georg.brandl | 2010-08-02 19:49:25 +0200 (Mo, 02 Aug 2010) | 1 line #8578: mention danger of not incref'ing weak referenced object. ........ r83546 | georg.brandl | 2010-08-02 21:16:34 +0200 (Mo, 02 Aug 2010) | 1 line #7973: Fix distutils options spelling. ........ r83547 | georg.brandl | 2010-08-02 21:19:26 +0200 (Mo, 02 Aug 2010) | 1 line #7386: add example that shows that trailing path separators are stripped. ........ r83548 | georg.brandl | 2010-08-02 21:23:34 +0200 (Mo, 02 Aug 2010) | 1 line #8172: how does one use a property? ........ r83550 | georg.brandl | 2010-08-02 21:32:43 +0200 (Mo, 02 Aug 2010) | 1 line #9451: strengthen warning about __*__ special name usage. ........ r83554 | georg.brandl | 2010-08-02 21:43:05 +0200 (Mo, 02 Aug 2010) | 1 line #7280: note about nasmw.exe. ........ r83555 | georg.brandl | 2010-08-02 21:44:48 +0200 (Mo, 02 Aug 2010) | 1 line #8861: remove unused variable. ........ r83558 | georg.brandl | 2010-08-02 22:05:19 +0200 (Mo, 02 Aug 2010) | 1 line #8648: document UTF-7 codec functions. ........ r83563 | georg.brandl | 2010-08-02 22:21:21 +0200 (Mo, 02 Aug 2010) | 1 line #9037: add example how to raise custom exceptions from C code. ........ r83565 | georg.brandl | 2010-08-02 22:27:20 +0200 (Mo, 02 Aug 2010) | 1 line #9111: document that do_help() looks at docstrings. ........ r83571 | georg.brandl | 2010-08-02 22:44:34 +0200 (Mo, 02 Aug 2010) | 1 line Clarify that abs() is not a namespace. ........ r83574 | georg.brandl | 2010-08-02 22:47:56 +0200 (Mo, 02 Aug 2010) | 1 line #6867: epoll.register() returns None. ........ r83575 | georg.brandl | 2010-08-02 22:52:10 +0200 (Mo, 02 Aug 2010) | 1 line #9238: zipfile does handle archive comments. ........
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stdscr = curses.initscr()
# Turn off echoing of keys, and enter cbreak mode,
# where no buffering is performed on keyboard input
curses.noecho()
curses.cbreak()
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# 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
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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:
curses.start_color()
except:
pass
return func(stdscr, *args, **kwds)
finally:
# Set everything back to normal
if 'stdscr' in locals():
stdscr.keypad(0)
curses.echo()
curses.nocbreak()
curses.endwin()