#! /usr/bin/env python
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"""
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Description:
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Programm zur Ausgabe einer Ansicht eines Monats wie gängige Kalender-Format
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Usage:
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```
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$ python month_of_year.py 12 2024
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```
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"""
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from typing import Final
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import sys
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# Calender setup
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weekdays: Final[tuple[str, ...]] = ("So", "Mo", "Di", "Mi", "Do", "Fr", "Sa")
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first_day_of_week: Final[int] = 1 # it is monday, common in Europa
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months: Final[tuple[ tuple[str, int], ...]] = (("", 0),
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("Januar", 31), ("Februar", 28), ("März", 31),
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("April", 30), ("Mai", 31), ("Juni", 30),
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("July", 31), ("August", 31), ("September", 30),
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("Oktober", 31), ("November", 30), ("Dezember", 31))
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def is_leap_year(year: int) -> bool:
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return (year % 4 == 0 and year % 100 != 0) or (year % 400 == 0)
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def weekday_of_date(day: int, month: int, year: int) -> int:
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y0 = year - ((14 - month) // 12)
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x = y0 + (y0 // 4) - (y0 // 100) + (y0 // 400)
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m0 = month + 12 * ((14 - month) // 12) - 2
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return (day + x + (31 * m0) // 12) % 7
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def count_days_in_month(month: int, year: int) -> int:
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count_days = months[month][1]
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if month == 2 and is_leap_year(year):
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count_days += 1
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return count_days
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def build_calendar_head(month: int, year: int, calendar_width: int, fill_char: str =' ') -> str:
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head_line = f"{months[month][0]} {year}"
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return head_line.center(calendar_width, fill_char)
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def build_weekdays_line(column_width) -> str:
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wd_line = ""
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for i in range(0, 7):
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d = (i + first_day_of_week) % 7
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wd_line += f"{weekdays[d]}".rjust(column_width, ' ')
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return wd_line
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def format_day(day: int, column_width: int) -> str:
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return f"{day}".rjust(column_width)
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def build_month_view(month: int, year: int, column_width: int) -> str:
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month_view = ""
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day = 1
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# the first week
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day_of_first_date = weekday_of_date(day, month, year)
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# how many columns before the first day of this month
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diff = (7 + day_of_first_date - first_day_of_week) % 7
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# -> empty column
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for _ in range(diff, 0, -1):
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month_view += ("-" + "#"*(column_width - 1) )
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# -> next days in the first week
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while day + diff <= 7:
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month_view += format_day(day, column_width)
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day += 1
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month_view += "\n"
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# next weeks
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days_in_month = count_days_in_month(month, year)
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while day <= days_in_month:
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month_view += format_day(day, column_width)
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if (day + diff) % 7 == 0 and (day < days_in_month):
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month_view += "\n"
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day += 1
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return month_view
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def build_calendar(month: int, year: int, column_width: int = 3) -> str:
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calendar_width = 7 * column_width
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head_line = build_calendar_head(month, year, calendar_width, fill_char="-")
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calendar_view = f"{head_line}\n"
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weekdays_line = build_weekdays_line(column_width)
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calendar_view += f"{weekdays_line}\n"
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month_view = build_month_view(month, year, column_width)
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calendar_view += f"{month_view}"
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return calendar_view
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if __name__ == "__main__":
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month = int(sys.argv[1])
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year = int(sys.argv[2])
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cal = build_calendar(month, year, 5)
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print(cal)
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