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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

Simple Time Machine

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

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
40,532 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


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.

to simplify:

import datetime

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

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