Pmw.py 文件源码

def _changeDate(value, factor, increment, format = 'ymd',
        separator = '/', yyyy = 0):

  jdn = datestringtojdn(value, format, separator) + factor * increment

  y, m, d = jdntoymd(jdn)
  result = ''
  for index in range(3):
    if index > 0:
      result = result + separator
    f = format[index]
    if f == 'y':
      if yyyy:
        result = result + '%02d' % y
      else:
        result = result + '%02d' % (y % 100)
    elif f == 'm':
      result = result + '%02d' % m
    elif f == 'd':
      result = result + '%02d' % d

  return result