In [1]:

    

import calendar
import datetime


    

In [2]:

    

print(calendar.month(2019, 1))


    

    




    January 2019
Mo Tu We Th Fr Sa Su
    1  2  3  4  5  6
 7  8  9 10 11 12 13
14 15 16 17 18 19 20
21 22 23 24 25 26 27
28 29 30 31

In [3]:

    

def get_nth_week(day):
    return (day - 1) // 7 + 1


    

In [4]:

    

def get_nth_dow(year, month, day):
    return get_nth_week(day), calendar.weekday(year, month, day)


    

In [5]:

    

print(get_nth_dow(2019, 1, 7))


    

    




(1, 0)

In [6]:

    

print(get_nth_dow(2019, 1, 20))


    

    




(3, 6)

In [7]:

    

def get_nth_dow_datetime(year, month, day):
    return get_nth_week(day), datetime.date(year, month, day).weekday()


    

In [8]:

    

print(get_nth_dow_datetime(2019, 1, 7))


    

    




(1, 0)

In [9]:

    

print(get_nth_dow_datetime(2019, 1, 20))


    

    




(3, 6)

In [10]:

    

def get_nth_dow_datetime_dt(dt):
    return get_nth_week(dt.day), dt.weekday()


    

In [11]:

    

dt = datetime.datetime(2019, 1, 20)
print(get_nth_dow_datetime_dt(dt))


    

    




(3, 6)

In [12]:

    

d = datetime.date(2019, 1, 20)
print(get_nth_dow_datetime_dt(d))


    

    




(3, 6)

In [13]:

    

print(datetime.date.today())


    

    




2019-07-29

In [14]:

    

print(get_nth_dow_datetime_dt(datetime.date.today()))


    

    




(5, 0)

In [15]:

    

print(calendar.month(2019, 1))


    

    




    January 2019
Mo Tu We Th Fr Sa Su
    1  2  3  4  5  6
 7  8  9 10 11 12 13
14 15 16 17 18 19 20
21 22 23 24 25 26 27
28 29 30 31

In [16]:

    

calendar.setfirstweekday(6)
print(calendar.month(2019, 1))


    

    




    January 2019
Su Mo Tu We Th Fr Sa
       1  2  3  4  5
 6  7  8  9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30 31

In [17]:

    

def get_nth_week2(year, month, day, firstweekday=0):
    first_dow = calendar.monthrange(year, month)[0]
    offset = (first_dow - firstweekday) % 7
    return (day + offset - 1) // 7 + 1


    

In [18]:

    

print(get_nth_week2(2019, 1, 20))


    

    




3

In [19]:

    

print(get_nth_week2(2019, 1, 20, 6))


    

    




4

In [20]:

    

def get_nth_week2_datetime(year, month, day, firstweekday=0):
    first_dow = datetime.date(year, month, 1).weekday()
    offset = (first_dow - firstweekday) % 7
    return (day + offset - 1) // 7 + 1


    

In [21]:

    

print(get_nth_week2_datetime(2019, 1, 20))


    

    




3

In [22]:

    

print(get_nth_week2_datetime(2019, 1, 20, 6))


    

    




4

In [23]:

    

def get_nth_week2_datetime_dt(dt, firstweekday=0):
    first_dow = dt.replace(day=1).weekday()
    offset = (first_dow - firstweekday) % 7
    return (dt.day + offset - 1) // 7 + 1


    

In [24]:

    

dt = datetime.datetime(2019, 1, 20)
print(get_nth_week2_datetime_dt(dt))


    

    




3

In [25]:

    

print(get_nth_week2_datetime_dt(dt, 6))


    

    




4

In [26]:

    

d = datetime.date(2019, 1, 20)
print(get_nth_week2_datetime_dt(d))


    

    




3

In [27]:

    

print(get_nth_week2_datetime_dt(d, 6))


    

    




4

In [28]:

    

print(datetime.date.today())


    

    




2019-07-29

In [29]:

    

print(get_nth_week2_datetime_dt(datetime.date.today()))


    

    




5

In [30]:

    

print(get_nth_week2_datetime_dt(datetime.date.today(), 6))


    

    




5