new_contents: #!/usr/bin/env python
  """Calendar display functions
  
  Circumvent ungainly format issues of ActivePython on Cygwin."""
  
  import argparse
  import calendar
  import datetime
  
  def pr1j(i, j, k):
      """Print a monthly Julian calendar."""
      (v_0, v_1), v_2, v_3 = j, ' ' * 3, k.tm_yday
      if 6 == i and v_0 < 6:
          v_4 = [v_2] * (v_0 + 1)
      elif 0 == i and 0 < v_0:
          v_4 = [v_2] * v_0
      else:
          v_4 = []
      v_4 += [str(i + v_3).rjust(3) for i in range(v_1)]
      v_0, v_1 = len(v_4) % 7, []
      if 0 < v_0:
          v_4 += [v_2] * (7 - v_0)
      for v_0 in range(0, len(v_4), 7):
          v_1.append(' '.join(v_4[v_0 : v_0 + 7]))
      return v_1
  
  def pr3m(i, j, k):
      """Print three months in a row."""
      lst3 = [i, j, k]
      len3 = [len(lst1) for lst1 in lst3]
      max3 = max(len3)
      for (len1, lst1) in zip(len3, lst3):
          if max3 > len1:
              lst1.append('')
      for row in range(max3):
          print(''.center(6).join([lst1[row].ljust(20) for lst1 in lst3]))
  
  def main(opt):
      """Print a calendar."""
      c = calendar.TextCalendar(calendar.MONDAY if opt.m else calendar.SUNDAY)
      formatyear = lambda y: '\n'.join(c.formatyear(y).split('\n')[0:-1])
      f = lambda y, m: c.formatmonth(y, m).split('\n')[0:-1]
  
      if opt.iy is None:
          print(formatyear(opt.yr))
      elif 0 < opt.iy:
          print(formatyear(opt.iy))
      elif opt.i3:
          i, j = datetime.date(opt.yr, opt.mo, 1), datetime.timedelta(days=1)
          prv = i - j
          nxt = i.replace(day=calendar.monthrange(opt.yr, opt.mo)[1]) + j
          i = f(prv.year, prv.month)
          j = f(opt.yr, opt.mo)
          k = f(nxt.year, nxt.month)
          pr3m(i, j, k)
      elif opt.j:
          print('\n'.join(c.formatmonth(opt.yr, opt.mo, 3).split('\n')[:2] +
                          pr1j(c.firstweekday,
                               calendar.monthrange(opt.yr, opt.mo),
                               datetime.date(opt.yr, opt.mo, 1).timetuple())))
      elif opt.i1:
          print('\n'.join(f(opt.yr, opt.mo)))
  
  if __name__ == '__main__':
      FOO = datetime.date.today()
      # Ultimate goal
      #   usage: cal.py [-smjy13] [[month] year]
      # Attained insofar
      #   usage: cal.py [-h] [-s | -m] [-y [year]] [-1 | -3 | -j] [month] [year]
      BAR = argparse.ArgumentParser(description='A cal emulator')
      BAZ = BAR.add_mutually_exclusive_group()
      BAZ.add_argument('-s',
                       help='Display Sunday as the first day of the week.',
                       action='store_true', default=True)
      BAZ.add_argument('-m',
                       help='Display Monday as the first day of the week.',
                       action='store_true', default=False)
      BAR.add_argument('-y', metavar='year', type=int,
                       help='Display a yearly calendar.',
                       choices=range(datetime.MINYEAR, datetime.MAXYEAR),
                       dest='iy', nargs='?', default=0)
      BAZ = BAR.add_mutually_exclusive_group()
      BAZ.add_argument('-1', dest='i1',
                       help='Display single month output.',
                       action='store_true', default=True)
      BAZ.add_argument('-3', dest='i3',
                       help='Display prev/current/next month output.',
                       action='store_true', default=False)
      BAZ.add_argument('-j',
                       help='Display Julian dates for a month.',
                       action='store_true', default=False)
      BAR.add_argument(metavar='month', type=int,
                       choices=range(1, 13),
                       dest='mo', nargs='?', default=FOO.month)
      BAR.add_argument(metavar='year', type=int,
                       choices=range(datetime.MINYEAR, datetime.MAXYEAR),
                       dest='yr', nargs='?', default=FOO.year)
  
      main(BAR.parse_args())
  
subject: Create cal.py