xmas-market.py

# -*- coding: utf-8 -*-
#
# frwd to other interested parties at the institute
#
import datetime, time, sys

leave_at = datetime.datetime(2012, 12, 13, 12, 00)
first = True
while True:
    delta = leave_at - datetime.datetime.now()
    if abs(delta.seconds) < 120:
        raise SystemExit, u"Immediately leave for *xmas market Esslingen*, " +\
            u"12:14 S-Bahn UNIVERSITÄT, 13th Dec. 2012"
    elif delta.seconds > 0:
        if first:
            sys.stdout.write("Leave for *xmas market Esslingen* in xxh xxm xxs")
            first = False
        hh = delta.seconds / 3600
        mm = (delta.seconds % 3600) / 60
        ss = delta.seconds % 60
        timestr = "%02dh %02dm %02ds" % (hh, mm, ss)
        sys.stdout.write('\b' * len(timestr))
        sys.stdout.write(timestr)
        sys.stdout.flush()
    else:
        raise ValueError, "Too late, you missed joining us!"
    time.sleep(1)