11.12 LAB: Dates

Question

Complete the code to implement the following operations:

1. Complete read_date():
2. Read an input string representing a date in the format yyyy-mm-dd.
3. Create a date object from the input string.
4. Return the date object.
5. Call read_date() to read four (unique) date objects and store the date objects in a list.
6. Call sorted() to sort the list of date objects, earliest first. Store the sorted dates in a new list.
7. Output the sorted_dates, in the format mm/dd/yy.
8. Hint: Use strftime() to format the date outputs. (See resource below.)
9. Output the number of days between the last two dates in the sorted list as a positive number.
10. Output the date that is 3 weeks from the most recent date in the format "July 4, 1776".
11. Hint: Use timedelta() to set a duration of time for the arithmetic on date objects. (See resources below.)
12. Ex: timedelta(days=50, seconds=27, hours=8, weeks=2) will define a duration of 50 days + 27 seconds + 8 hours + 2 weeks.
13. Output the full name of the day of the week of the earliest day.

Ex: If the input is:

2022-01-27

2022-07-04

2020-12-31

2022-07-29

the output is:

12/31/2020

01/27/2022

07/04/2022

07/29/2022

25

August 19, 2022

Thursday

Answer 1

from datetime import datetime, timedelta

def read_date():

date_str = input("Enter a date in the format yyyy-mm-dd: ")

return datetime.strptime(date_str, "%Y-%m-%d")

date_list = []

for i in range(4):

date = read_date()

while date in date_list:

date = read_date()

date_list.append(date)

sorted_dates = sorted(date_list)

for date in sorted_dates:

print(date.strftime("%m/%d/%Y"))

last_date = sorted_dates[-1]

second_last_date = sorted_dates[-2]

days_diff = (last_date - second_last_date).days

print(days_diff)

three_weeks_later = last_date + timedelta(weeks=3)

print(three_weeks_later.strftime("%B %d, %Y"))

earliest_day = sorted_dates[0]

print(earliest_day.strftime("%A"))

The code above implements the prompt's operations. It uses the datetime module to create date objects, ‘strftime()’ to format the date output, ‘sorted()’ to sort the list of dates, ‘timedelta()’ to perform arithmetic on date objects and ‘strptime()’ to create date objects from the input string.

It will read four ‘(unique)’ date objects from the user and store the date objects in a list. It will sort the list of date objects, earliest first. Store the sorted dates in a new list and output the sorted_dates, in the format mm/dd/yy. This function will return a positive number indicating the number of days between the last two dates in the sorted list. This function returns the date three weeks from the most recent date using the format "July 4, 1776" with the day of the week of the earliest date output.