diff options
Diffstat (limited to 'Demo')
| -rw-r--r-- | Demo/curses/README | 13 | ||||
| -rwxr-xr-x | Demo/curses/repeat.py | 58 |
2 files changed, 64 insertions, 7 deletions
diff --git a/Demo/curses/README b/Demo/curses/README index 7635c3d..f2a3b74 100644 --- a/Demo/curses/README +++ b/Demo/curses/README @@ -10,11 +10,11 @@ originals. I won't attempt to `beautify' the program anytime soon, but I wouldn't mind someone else making an effort in that direction, of course. -ncurses.py -- currently only a panels demo +ncurses.py -- currently only a panels demo XXX this won't work until panel support is checked in -rain.py -- raindrops keep falling on my desktop -tclock.py -- ASCII clock, by Howard Jones -xmas.py -- I'm dreaming of an ASCII christmas +rain.py -- raindrops keep falling on my desktop +tclock.py -- ASCII clock, by Howard Jones +xmas.py -- I'm dreaming of an ASCII christmas Please send bugfixes and new contributions to me or, even better, submit them to the Python Bug Tracker on SourceForge @@ -24,6 +24,5 @@ submit them to the Python Bug Tracker on SourceForge Other demos =========== -life.py Simple game of Life - - +life.py -- Simple game of Life +repeat.py -- Repeatedly execute a shell command (like watch(1)) diff --git a/Demo/curses/repeat.py b/Demo/curses/repeat.py new file mode 100755 index 0000000..158264c --- /dev/null +++ b/Demo/curses/repeat.py @@ -0,0 +1,58 @@ +#! /usr/bin/env python + +"""repeat <shell-command> + +This simple program repeatedly (with 1-second intervals) executes the +shell command given on the command line and displays the output (or as +much of it as fits on the screen). It uses curses to paint each new +output on top of the old output, so that if nothing changes, the +screen doesn't change. This is handy to watch for changes in e.g. a +directory or process listing. + +To end, hit Control-C. +""" + +# Author: Guido van Rossum + +# Disclaimer: there's a Linux program named 'watch' that does the same +# thing. Honestly, I didn't know of its existence when I wrote this! + +# To do: add features until it has the same functionality as watch(1); +# then compare code size and development time. + +import os +import sys +import time +import curses + +def main(): + if not sys.argv[1:]: + print __doc__ + sys.exit(0) + cmd = " ".join(sys.argv[1:]) + p = os.popen(cmd, "r") + text = p.read() + sts = p.close() + if sts: + print >>sys.stderr, "Exit code:", sts + sys.exit(sts) + w = curses.initscr() + try: + while 1: + w.erase() + try: + w.addstr(text) + except curses.error: + pass + w.refresh() + time.sleep(1) + p = os.popen(cmd, "r") + text = p.read() + sts = p.close() + if sts: + print >>sys.stderr, "Exit code:", sts + sys.exit(sts) + finally: + curses.endwin() + +main() |