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

Welser Muñoz
Welser Muñoz
4,447 Points
Posted by Welser Muñoz
Welser Muñoz
4,447 Points

Simple Time Machine

Hi, I have a doubt!, I don't really understand what you are asking me the question.

time_machine.py 
import datetime

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

def delorean(a):
  now = datetime.datetime.now()
  diff = starter - now
  seconds = diff.total_seconds()
  hours = round(seconds/3600)
  return hours

3 Answers

Dan Johnson
Dan Johnson
40,533 Points
Dan Johnson
Dan Johnson
40,533 Points

This challenge is showing the use of timedelta objects. timedeltas let you treat date and times more like basic numeric types. You can add or subtract them to move forward or back in time. For example:

import datetime

starter = datetime.datetime(2015, 10, 21, 16, 29)
delta = datetime.timedelta(hours=1)

one_hour_ahead = starter + delta

print(one_hour_ahead)

Will print out:

2015-10-21 17:29:00

So to use this in the challenge you'll want to make a function that can take one argument that represents how many hours someone wants to move ahead from the starter date, and return that new date.

sradms0
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sradms0
Treehouse Project Reviewer
sradms0
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sradms0
Treehouse Project Reviewer

to simplify:

import datetime

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

def delorean(num):
    return starter.replace(hour = starter.hour + num)