Created
November 28, 2021 14:17
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"""A small script to find all months that have a Monday 25th for a particular | |
year. | |
Input: year in format YYYY | |
Output: print list of dates that are a Monday 25 in that year | |
""" | |
import re | |
import sys | |
from typing import Iterator | |
from datetime import date | |
VALID_YEAR_FORMAT = re.compile(r"(\d{4})") | |
REQUIRED_DAY_NUMBER = 25 | |
MONDAY = 0 | |
def _get_raw_input() -> str: | |
if len(sys.argv) > 1: | |
return sys.argv[1] | |
return input("Enter year (YYYY): ") | |
def _validate_and_parse_raw_input(raw_input: str) -> int: | |
if year := re.match(VALID_YEAR_FORMAT, raw_input): | |
return int(year.group(0)) | |
raise RuntimeError(f"{raw_input!r} doesn't comply with the format (YYYY)") | |
def parse_input() -> int: | |
raw_input = _get_raw_input() | |
return _validate_and_parse_raw_input(raw_input) | |
def _is_monday(a_date: date) -> bool: | |
return a_date.weekday() == MONDAY | |
def find_all_required(year: int) -> Iterator[date]: | |
for month in range(1, 12 + 1): | |
candidate = date(year, month, REQUIRED_DAY_NUMBER) | |
if _is_monday(candidate): | |
yield candidate | |
def display(dates: Iterator[date]): | |
for day in dates: | |
print(day.strftime("%A %d of %B, %Y")) | |
def main(): | |
year: int = parse_input() | |
results_found = find_all_required(year) | |
display(results_found) | |
if __name__ == "__main__": | |
main() |
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