lifeclock.py

#!/usr/bin/env python
# coding: utf-8
"""
The power of numbers is never more evident than when we use them to speculate
on the time of our dying. Sometimes I bargain with myself. Would I be willing
to accept sixty-five, Genghis Khan's age on dying? Suleiman the Magnificent
made it to seventy-six. That sounds all right, especially the way I feel now,
but how will it sound when I'm seventy-three?

Don DeLillo, White Noise
"""

from datetime import datetime as dt

adult_age = 18
death_age = 50

birth_dt = dt(year=1994, month=1, day=20)
adult_dt = birth_dt.replace(year=1994+adult_age)
death_dt = birth_dt.replace(year=1994+death_age)
now_dt = dt.utcnow()

birth = birth_dt.toordinal()
adult = adult_dt.toordinal()
now = now_dt.toordinal()
death = death_dt.toordinal()

days_lived = now - birth
days_adult = now - adult
days_remaining = death - now
lived_percentage = days_lived / float(death - birth) * 100
adult_percentage = days_adult / float(death - adult) * 100

def main():
  print '{} days gone ({} as an adult), {} remaining ({:.2f}% alive, {:.2f}% adult)'.format(
      days_lived, days_adult, days_remaining, lived_percentage, adult_percentage)

if __name__ == '__main__':
  main()

$ python lifeclock.py
8155 days gone (1581 as an adult), 10107 remaining (44.66% alive, 13.53% adult)