how to print previous 30 days from a date in python and the same in Tkinter

Question

I am using Tkinter to build a Corona Travel History Questionnaire.

The front end has options to select a particular date - \" D-Day Cronoa Confirmed\". Once the D-day is

Answer 1

datetime and timedelta are made for this.

from datetime import datetime, timedelta                                                                                                                                                            

start = datetime(2020, 1, 1)                                                                                                                                                                        

for day in range(1, 31): 
   print(start-timedelta(days=day))