change date format python

datetime.datetime.strptime("2013-1-25", '%Y-%m-%d').strftime('%m/%d/%y')

import datetime

x = datetime.datetime(2018, 9, 15)

print(x.strftime("%b %d %Y %H:%M:%S"))

>>> datetime.today().strftime('%Y-%m-%d-%H:%M:%S')
'2021-01-26-16:50:03'