Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Python Dates and Times in Python (2014) Let's Build a Timed Quiz App Harder Time Machine

Posted by Scott Halford
Scott Halford
8,964 Points

Need Help with Time Machine Challenge

import datetime

starter = datetime.datetime(2015, 10, 21, 16, 29)

Remember, you can't set "years" on a timedelta!

Consider a year to be 365 days.

Example

time_machine(5, "minutes") => datetime(2015, 10, 21, 16, 34)

def time_machine(tm_int, tm__str): if tm_str == 'minutes': starter + datetime.timedelta(minutes = tm_int) elif tm_str == 'hours': starter + datetime.timedelta(hours = tm_int) elif tm_str == 'days': starter + datetime.timedalta(days = tm_int) elif tm_str == 'years': starter + datetime.timedelta(days = tm_int * 365)

return starter + datetime.timedelta(tm_str = tm_int)
time_machine.py 
import datetime


starter = datetime.datetime(2015, 10, 21, 16, 29)

# Remember, you can't set "years" on a timedelta!
# Consider a year to be 365 days.

## Example
# time_machine(5, "minutes") => datetime(2015, 10, 21, 16, 34)

def time_machine(tm_int, tm__str):
    if tm_str == 'minutes':
        starter + datetime.timedelta(minutes = tm_int)
    elif tm_str == 'hours':
        starter + datetime.timedelta(hours = tm_int)
    elif tm_str == 'days':
        starter + datetime.timedalta(days = tm_int)
    elif tm_str == 'years':
        starter + datetime.timedelta(days = tm_int * 365)

    return starter + datetime.timedelta(tm_str = tm_int)

1 Answer

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,423 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,423 Points

You have the right idea. First correct the typo in tm__str (has double underscore).

Next, in each if block, assign the result of adding the timedelta and starter to a variable. For example:

result = starter + datetime.timedelta(days = tm_int * 365)

Finally, return the result:

return result
Scott Halford
Scott Halford
8,964 Points

Thank you Chris for your help on this holiday weekend.