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

Kristian Gausel
Kristian Gausel
14,661 Points
Posted by 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 ?

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(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

wantingedwards
wantingedwards
12,177 Points
wantingedwards
wantingedwards
12,177 Points

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
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.