time later tan in datetime python code example

Example 1: converting datetime object format to datetime format python

df['date_time']=pd.to_datetime(df['date_time'], format='%d-%m-%Y %H.%M.%S')
#fomrat given in code should match the format of the feature
#here--> df['date_time'][0]=10-03-2004 18.00.00
#watchout for the blanks  '-' '.'

Example 2: datetime decreasing date python

from datetime import datetime, timedelta

d = datetime.today() - timedelta(days=days_to_subtract)