calculate beginning and end of the month given a date or datetime

gistfile1.txt

from datetime import datetime, timedelta, date
    

def start_and_end_of_month(d,return_datetime=True):
    if return_datetime:
        if isinstance(d,date):
            d=datetime(d.year,d.month,d.day)
        start = d.replace(day=1)
        next_month=d.replace(day=28)+timedelta(days=4)
        end = next_month - timedelta(days=1)+timedelta(hours=23,minutes=59,seconds=59)
    else:
        start = d.replace(day=1)
        next_month=d.replace(day=28)+timedelta(days=4)
        end = next_month-timedelta(days=next_month.day)
    return start, end

start_and_end_of_month(date.today())