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

Kristian Gausel
Kristian Gausel
14,661 Points

time_machine doesn't return the right datetime. But it seems pretty right when I run the same code locally

This should work. But it says it gets the wrong datetime. Can anyone explain why ?

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(i, s):
  r = None
  global starter
  if(s == "years"):
    s = "days"
    i *= 365
  exec("r = starter + datetime.timedelta("+str(s)+"="+str(i)+")")
  return r

1 Answer

the question is asking if s = years, days, hours or minutes. So you probably want to add more if statement, so elif statement to check if s is one of those. also you can just check if s is years and then turn it into days like if s==years: time_delta = datetime.timedetla(days=s*365) and your return would be much shorter

Kristian Gausel
Kristian Gausel
14,661 Points

Well, days hours and minutes can be passed as arguments directly into timedelta. So the only one needing manual interference is years.