A simple python implementation for calculating expiration time

This article example describes a simple implementation of python to calculate the expiration time. Shared for your reference. Specific as follows:

def time_passed(value):
  now = ()
  past = now - value
  if :
    return u'%s days ago' % 
  mins =  / 60
  if mins < 60:
    return u'%s minutes ago' % mins
  hours = mins / 60
  return u'%s hours ago' % hours

I hope that what I have described in this article will help you in your Python programming.