1#@!#!123s

: / usr / lib64 / python2.7 / Demo / curses /

Filename : repeat.py

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#! /usr/bin/python2.7

"""repeat <shell-command>

This simple program repeatedly (at 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 True:
            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()

Name	Size	Last Modified	Owner	Permissions
README	0.832 KB	April 19 2020 9:13:39	root	0644
life.py	7.177 KB	April 10 2024 4:57:37	root	0755
life.pyc	6.628 KB	April 10 2024 4:58:46	root	0644
life.pyo	6.628 KB	April 10 2024 4:58:46	root	0644
ncurses.py	6.492 KB	April 10 2024 4:57:37	root	0755
ncurses.pyc	5.708 KB	April 10 2024 4:58:46	root	0644
ncurses.pyo	5.708 KB	April 10 2024 4:58:46	root	0644
rain.py	2.347 KB	April 10 2024 4:57:37	root	0755
rain.pyc	2.241 KB	April 10 2024 4:58:46	root	0644
rain.pyo	2.241 KB	April 10 2024 4:58:46	root	0644
repeat.py	1.479 KB	April 10 2024 4:57:37	root	0755
repeat.pyc	1.419 KB	April 10 2024 4:58:46	root	0644
repeat.pyo	1.419 KB	April 10 2024 4:58:46	root	0644
tclock.py	3.253 KB	April 10 2024 4:57:37	root	0755
tclock.pyc	3.563 KB	April 10 2024 4:58:46	root	0644
tclock.pyo	3.563 KB	April 10 2024 4:58:46	root	0644
xmas.py	24.85 KB	April 19 2020 9:13:39	root	0644
xmas.pyc	19.398 KB	April 10 2024 4:58:46	root	0644
xmas.pyo	19.398 KB	April 10 2024 4:58:46	root	0644

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