To get python datetime object from string of datetime for the given format

datetime_from_string.py

import datetime

def get_datetime_from_string(datetime_string, datetime_format='%Y-%m-%d %H:%M:%S'):
    """
    if datetime string includes milliseconds (e.g. '2022-12-06 11:22:23.222') 
    then the datetime format will be '%Y-%m-%d %H:%M:%S.%f' to include fraction
    """
    return datetime.datetime.strptime(datetime_string, datetime_format)