generate_date_list.py

#!/usr/bin/python3

from datetime import date, timedelta


def represents_int(s):
    try:
        int(s)
        return True
    except ValueError:
        return False


def represents_date(s):
    if len(s) != 4 + 2 + 2:
        return False

    year = s[0:4]
    month = s[4:6]
    day = s[6:8]

    if represents_int(year) and represents_int(month) and represents_int(day):
        year = int(year)
        month = int(month)
        day = int(day)

        try:
            date(year, month, day)
            return True
        except ValueError:
            return False


def get_date(s):
    year = int(s[0:4])
    month = int(s[4:6])
    day = int(s[6:8])
    return date(year, month, day)


def main():
    first_date_input = input("Enter start date: ")

    while not represents_date(first_date_input):
        first_date_input = input("Enter start date (in the format yyyymmdd, e.g. 20191231): ")
    first_date = get_date(first_date_input)

    first_number_input = input("Enter first number: ")
    while not represents_int(first_number_input):
        first_number_input = input("Enter first number (an integer, e.g. 34): ")
    first_number = int(first_number_input)

    end_date_input = input("Enter end date: ")
    while not represents_date(end_date_input):
        end_date_input = input("Enter end date (in the format yyyymmdd, e.g. 20191231): ")
    end_date = get_date(end_date_input)

    current_date = first_date
    current_number = first_number

    print_format = """{}
|{}
|
|{{{{Start date|{}|{}|{}|df=y}}}}
|-"""

    while current_date <= end_date:
        if current_date.weekday() == 4: # friyay
            cell_format = 'style="border-bottom: 2px solid black"'
        else:
            cell_format = ''
        if current_date.weekday() < 5:  # only print mon-fri
            print(print_format.format(cell_format, current_number, current_date.year, current_date.month, current_date.day), end='')
            current_number += 1
        current_date += timedelta(days=1)


if __name__ == "__main__":
    main()
    # Example input:
    # 20140101
    # 1
    # 20140201