Initial revision
diff --git a/Demo/scripts/unbirthday.py b/Demo/scripts/unbirthday.py
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+++ b/Demo/scripts/unbirthday.py
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+#! /usr/local/bin/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 arly 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()