have a variable I've set up
now = datetime.datetime.now()
I want to be able to set up a variable, yesterday, that just takes now and subtracts one day from it. 
I'm sure that this is super-easy, but how do I do this?
have a variable I've set up
now = datetime.datetime.now()
I want to be able to set up a variable, yesterday, that just takes now and subtracts one day from it. 
I'm sure that this is super-easy, but how do I do this?
 
    
    You can use datetime.timedelta:
now = datetime.datetime.now()
yesterday = now - datetime.timedelta(days=1)
