Answer to Question #213555 in Python for Ravi

Question

Day Name - 2

Given the weekday of the first day of the month, determine the day of the week of the given date in that month.

Input

The first line is a string

D. The second line is an integer N.Output

The output should be a string.

Explanation

In the given example,

D = Monday. As the 1st of the day of the month is a Monday, it means the 7th and 14th of the month will also be Mondays (A week has 7 days). So the 16th day (N = 16) of the month will be a Tuesday.So, the output should be

Tuesday.

Sample Input 1

Monday

16

Output:

Tuesday

sample Input-2:

Tuesday

17

Output:

Thursday

Answer 1

def determine_day_by_number(start_day: str, month_day_number: int):
    number_to_day = dict(
        [[1, 'Monday'], [2, 'Tuesday'], [3, 'Wednesday'], [4, 'Thursday'], [5, 'Friday'], [6, 'Saturday'],
         [7, 'Sunday']])
    day_to_number = dict(zip(number_to_day.values(), number_to_day.keys()))

    if start_day not in number_to_day.values():
        print('Wrong day name')
        exit()

    start_day_number = day_to_number[start_day]
    shift = get_day_shift(start_day_number, month_day_number)
    number_of_required_day = start_day_number + shift

    return number_to_day[number_of_required_day]


def get_day_shift(start_day_number: int, month_day_number: int):
    shift = month_day_number
    if start_day_number + shift > 7:
        number_of_full_weeks = shift // 7
        shift -= 7 * number_of_full_weeks + 1
    return shift if not start_day_number + shift > 7 else shift - 7


def main():
    start_day = input('Enter start day: ')
    month_day_number = int(input('Enter shift number: '))

    day = determine_day_by_number(start_day, month_day_number)
    print(day)


if __name__ == '__main__':
    main()