How can I subtract a day from a python date?

I have a python datetime.datetime object. What is the best way to subtract one day?

From stackoverflow defrex

• e.g.

  from datetime import date, timedelta
  
  d=date.today()-timedelta(days=days_to_subtract)
  

  From Steve B.

• Subtract datetime.timedelta(days=1)

  From S.Lott