Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

Python Functional Python Functional Workhorses Map and Filter

Create a function that calculates the difference between dates and checks if it is bigger than a number

Hi, I'm having troubles solving this one. I cannot get how to compute the difference between dates. I suspect there is an easier way that the one I try below. Your help will be greatly appreciated.

birthdays.py
import datetime

birthdays = [
    datetime.datetime(2012, 4, 29),
    datetime.datetime(2006, 8, 9),
    datetime.datetime(1978, 5, 16),
    datetime.datetime(1981, 8, 15),
    datetime.datetime(2001, 7, 4),
    datetime.datetime(1999, 12, 30)
]



is over_13(date):
  today = datetime.datetime.today()
  diff = today - date
  return round(diff.seconds/86400) >= 4745 

1 Answer

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,063 Points

Hi Jose, two issues with your current code: the function definition syntax, and the use of the timedelta object diff

The proper function should be defined using the keyword def and no spaces in the function name:

def is_under_13(date):

Subtracting twodaatetime objects results in a timedelta object. In your code, you've call it diff. A timedelta object has these properties (from help(datetime.timedelta):

 |  days
 |      Number of days.
 |  
 |  microseconds
 |      Number of microseconds (>= 0 and less than 1 second).
 |  
 |  seconds
 |      Number of seconds (>= 0 and less than 1 day).

Note that the seconds attribute contains only the partial seconds of less than 1 day. You need to use the days attribute. Add this to your code:

def is_over_13(date):
    #today = datetime.datetime.today() #<-- not needed defined as global
    diff = today - date
    return diff.days >= 4745