python - Print something if the date changes

Question

What exactly I am trying to do here is when Tomorrow comes (00:00) it should print Yes

import datetime
from datetime import date

r = True
rr = True
while r:
    Today_Date = date.today()
    while rr:
        Tomorrow_Date = datetime.date.today() + datetime.timedelta(days=1)
        if Today_Date == Tomorrow_Date:
            print("Yes")

question from:https://stackoverflow.com/questions/65838312/print-something-if-the-date-changes

Answer 1

The way you have it now, your rr while loop will continually run and update Tomorrow_Date, and when the day rolls over, it will update before it has a chance to be compared to Today_Date. You should set both Today_Date and Tomorrow_Date outside that loop, and only update them when the dates change.

This should do the trick:

If you want two loops for other reasons:

import datetime

r = True
while r:
  rr = True
    Tomorrow_Date = datetime.date.today() + datetime.timedelta(days=1)
    while rr:
        if datetime.date.today() >= Tomorrow_Date:
            print("Yes")
            rr = False

Or as a single loop:

import datetime

r = True
Tomorrow_Date = datetime.date.today() + datetime.timedelta(days=1)
while r:
    if datetime.date.today() >= Tomorrow_Date:
        print("Yes")
        Tomorrow_Date = datetime.date.today() + datetime.timedelta(days=1)

It might be a good idea to add a time.sleep() in to slow down the loops, depending on how accurate you need to be also.