workDaysAgo.py

# These functions are used to calculate how many work days have been in the previous N number of days

days = ['mon','tue','wed','thu','fri','sat','sun']

# this function counts the workdays within the last n days
def countWorkDays(daysAgo, dayOfWeek):
    # print(daysAgo, days[dayOfWeek])
    workDay = 1 if dayOfWeek < 5 else 0
    dayOfWeek = dayOfWeek - 1 if dayOfWeek > 0 else 6

    # recursion
    if daysAgo == 1:
        return workDay
    else:
        return workDay + countWorkDays(daysAgo-1, dayOfWeek)

# this function calculates the workdays within the last n days
def calculateWorkDays(daysAgo, dayOfWeek):
    rDays = daysAgo%7
    weeks = (daysAgo-rDays)/7

    # this +1 is an offset to count current day
    x = dayOfWeek+1 - rDays
    if x < -1: rDays -= 2
    elif x < 0: rDays -= 1

    return int(weeks*5 + rDays)

#today = days.index('mon')

daysAgo = 14
dayOfWeek = 0
a = countWorkDays(daysAgo, dayOfWeek)
b = calculateWorkDays(daysAgo, dayOfWeek)
print(a,b)