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 Alex Golden
Alex Golden
4,098 Points

Harder Time Machine is Harder

I keep getting an error: Bummer: 'new_time_str' is an invalid keyword argument for this function

I tried running the code in the workspace and it looks like datetime doesn't want me to input the new_time_str at all. Is there a way to get datetime to take this argument or am I relegated to a collection of "if" statements?

time_machine.py 
import datetime

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

def time_machine(num, time_str):
    # First, purage the EVIL LETTER S from the input string so that datetime doesn't herniate.
    new_time_str = time_str.replace("s", "")
    # Then return the original time PLUS the change in time with the new s-less string as the argument to be changed
    # using the integer input 'num' 
    return starter + datetime.timedelta(new_time_str = num)
    # get an error....
    # Get and error?
Eldin Guzin
Eldin Guzin
6,010 Points
Eldin Guzin
Eldin Guzin
6,010 Points

those comments got me lmao

1 Answer

Steven Parker
Steven Parker
231,275 Points
Steven Parker
Steven Parker
231,275 Points

You seem to have gotten off track a bit. Here's a few hints:

  • the keyword in an keyword/value argument cannot be a variable
  • you can build kwargs from a dictionary using the "splat" operator (but there are simpler approaches)
  • the letter "s" is a legitimate part of the keywords for arguments for "timedelta"
  • you need to handle "years" but "timedelta" doesn't do them itself (there originally was a comment about this)
Alex Golden
Alex Golden
4,098 Points

Steven! Thank you for a speedy reply.