Convert calendarweek into date

[DeaD_EyE]

Calculate the week from current datetime/date:

import datetime
year, week, day = datetime.datetime.now().isocalendar()
# weekday is from 1 - 7

# converting back to datetime/date
the_date = datetime.date.fromisocalendar(year, week, day)
the_datetime = datetime.datetime.fromisocalendar(year, week, day)

Now getting for date X the start date of the week and the end date of the week:

def get_week(date_or_datetime):
    MONDAY, SUNDAY = 1, 7
    calendar = datetime.date.fromisocalendar
    year, week, _ = date_or_datetime.isocalendar()
    return calendar(year, week, MONDAY), calendar(year, week, SUNDAY)

I assigned inside the function datetime.date.fromisocalendar to calendar.
Just to keep it shorter.