how to convert yyyy-mm-dd into datetime format in python code example

Example 1: python date from yy/mm/dd to yy-mm-dd

lastconnection = datetime.strptime("21/12/2008", "%d/%m/%Y").strftime('%Y-%m-%d')

Example 2: convert date yyyy-mm-dd to dd-mm-yyyy in python

import re
def change_date_format(dt):
        return re.sub(r'(\d{4})-(\d{1,2})-(\d{1,2})', '\\3-\\2-\\1', dt)
dt1 = "2026-01-02"
print("Original date in YYY-MM-DD Format: ",dt1)
print("New date in DD-MM-YYYY Format: ",change_date_format(dt1))