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Python Open Source » Mobile » Python for PalmOS 
Python for PalmOS » Python 1.5.2 reduced 1.0 » Demo » scripts » unbirthday.py
#! /usr/bin/env python

# Calculate your unbirthday count (see Alice in Wonderland).
# This is defined as the number of days from your birth until today
# that weren't your birthday.  (The day you were born is not counted).
# Leap years make it interesting.

import sys
import time
import calendar

def main():
  # Note that the range checks below also check for bad types,
  # e.g. 3.14 or ().  However syntactically invalid replies
  # will raise an exception.
  if sys.argv[1:]:
    year = eval(sys.argv[1])
  else:
    year = input('In which year were you born? ')
  if year in range(100):
    print 'I\'ll assume that by', year,
    year = year + 1900
    print 'you mean', year, 'and not the early Christian era'
  elif year not in range(1850, 2000):
    print 'It\'s hard to believe you were born in', year
    return
  #
  if sys.argv[2:]:
    month = eval(sys.argv[2])
  else:
    month = input('And in which month? (1-12) ')
  if month not in range(1, 13):
    print 'There is no month numbered', month
    return
  #
  if sys.argv[3:]:
    day = eval(sys.argv[3])
  else:
    day = input('And on what day of that month? (1-31) ')
  if month == 2 and calendar.isleap(year):
    maxday = 29
  else:
    maxday = calendar.mdays[month]
  if day not in range(1, maxday+1):
    print 'There are no', day, 'days in that month!'
    return
  #
  bdaytuple = (year, month, day)
  bdaydate = mkdate(bdaytuple)
  print 'You were born on', format(bdaytuple)
  #
  todaytuple = time.localtime(time.time())[:3]
  todaydate = mkdate(todaytuple)
  print 'Today is', format(todaytuple)
  #
  if bdaytuple > todaytuple:
    print 'You are a time traveler.  Go back to the future!'
    return
  #
  if bdaytuple == todaytuple:
    print 'You were born today.  Have a nice life!'
    return
  #
  days = todaydate - bdaydate
  print 'You have lived', days, 'days'
  #
  age = 0
  for y in range(year, todaytuple[0] + 1):
    if bdaytuple < (y, month, day) <= todaytuple:
      age = age + 1
  #
  print 'You are', age, 'years old'
  #
  if todaytuple[1:] == bdaytuple[1:]:
    print 'Congratulations!  Today is your', nth(age), 'birthday'
    print 'Yesterday was your',
  else:
    print 'Today is your',
  print nth(days - age), 'unbirthday'

def format((year, month, day)):
  return '%d %s %d' % (day, calendar.month_name[month], year)

def nth(n):
  if n == 1: return '1st'
  if n == 2: return '2nd'
  if n == 3: return '3rd'
  return '%dth' % n

def mkdate((year, month, day)):
  # Januari 1st, in 0 A.D. is arbitrarily defined to be day 1,
  # even though that day never actually existed and the calendar
  # was different then...
  days = year*365      # years, roughly
  days = days + (year+3)/4  # plus leap years, roughly
  days = days - (year+99)/100  # minus non-leap years every century
  days = days + (year+399)/400  # plus leap years every 4 centirues
  for i in range(1, month):
    if i == 2 and calendar.isleap(year):
      days = days + 29
    else:
      days = days + calendar.mdays[i]
  days = days + day
  return days

main()
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