771 lines
24 KiB
Python
771 lines
24 KiB
Python
"""Calendar printing functions
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Note when comparing these calendars to the ones printed by cal(1): By
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default, these calendars have Monday as the first day of the week, and
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Sunday as the last (the European convention). Use setfirstweekday() to
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set the first day of the week (0=Monday, 6=Sunday)."""
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import sys
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import datetime
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import locale as _locale
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from itertools import repeat
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__all__ = ["IllegalMonthError", "IllegalWeekdayError", "setfirstweekday",
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"firstweekday", "isleap", "leapdays", "weekday", "monthrange",
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"monthcalendar", "prmonth", "month", "prcal", "calendar",
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"timegm", "month_name", "month_abbr", "day_name", "day_abbr",
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"Calendar", "TextCalendar", "HTMLCalendar", "LocaleTextCalendar",
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"LocaleHTMLCalendar", "weekheader"]
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# Exception raised for bad input (with string parameter for details)
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error = ValueError
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# Exceptions raised for bad input
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class IllegalMonthError(ValueError):
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def __init__(self, month):
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self.month = month
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def __str__(self):
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return "bad month number %r; must be 1-12" % self.month
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class IllegalWeekdayError(ValueError):
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def __init__(self, weekday):
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self.weekday = weekday
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def __str__(self):
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return "bad weekday number %r; must be 0 (Monday) to 6 (Sunday)" % self.weekday
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# Constants for months referenced later
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January = 1
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February = 2
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# Number of days per month (except for February in leap years)
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mdays = [0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
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# This module used to have hard-coded lists of day and month names, as
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# English strings. The classes following emulate a read-only version of
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# that, but supply localized names. Note that the values are computed
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# fresh on each call, in case the user changes locale between calls.
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class _localized_month:
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_months = [datetime.date(2001, i+1, 1).strftime for i in range(12)]
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_months.insert(0, lambda x: "")
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def __init__(self, format):
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self.format = format
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def __getitem__(self, i):
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funcs = self._months[i]
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if isinstance(i, slice):
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return [f(self.format) for f in funcs]
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else:
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return funcs(self.format)
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def __len__(self):
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return 13
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class _localized_day:
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# January 1, 2001, was a Monday.
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_days = [datetime.date(2001, 1, i+1).strftime for i in range(7)]
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def __init__(self, format):
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self.format = format
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def __getitem__(self, i):
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funcs = self._days[i]
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if isinstance(i, slice):
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return [f(self.format) for f in funcs]
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else:
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return funcs(self.format)
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def __len__(self):
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return 7
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# Full and abbreviated names of weekdays
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day_name = _localized_day('%A')
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day_abbr = _localized_day('%a')
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# Full and abbreviated names of months (1-based arrays!!!)
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month_name = _localized_month('%B')
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month_abbr = _localized_month('%b')
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# Constants for weekdays
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(MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY, SUNDAY) = range(7)
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def isleap(year):
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"""Return True for leap years, False for non-leap years."""
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return year % 4 == 0 and (year % 100 != 0 or year % 400 == 0)
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def leapdays(y1, y2):
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"""Return number of leap years in range [y1, y2).
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Assume y1 <= y2."""
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y1 -= 1
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y2 -= 1
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return (y2//4 - y1//4) - (y2//100 - y1//100) + (y2//400 - y1//400)
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def weekday(year, month, day):
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"""Return weekday (0-6 ~ Mon-Sun) for year, month (1-12), day (1-31)."""
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if not datetime.MINYEAR <= year <= datetime.MAXYEAR:
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year = 2000 + year % 400
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return datetime.date(year, month, day).weekday()
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def monthrange(year, month):
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"""Return weekday (0-6 ~ Mon-Sun) and number of days (28-31) for
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year, month."""
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if not 1 <= month <= 12:
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raise IllegalMonthError(month)
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day1 = weekday(year, month, 1)
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ndays = mdays[month] + (month == February and isleap(year))
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return day1, ndays
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def monthlen(year, month):
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return mdays[month] + (month == February and isleap(year))
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def prevmonth(year, month):
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if month == 1:
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return year-1, 12
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else:
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return year, month-1
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def nextmonth(year, month):
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if month == 12:
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return year+1, 1
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else:
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return year, month+1
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class Calendar(object):
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"""
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Base calendar class. This class doesn't do any formatting. It simply
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provides data to subclasses.
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"""
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def __init__(self, firstweekday=0):
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self.firstweekday = firstweekday # 0 = Monday, 6 = Sunday
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def getfirstweekday(self):
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return self._firstweekday % 7
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def setfirstweekday(self, firstweekday):
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self._firstweekday = firstweekday
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firstweekday = property(getfirstweekday, setfirstweekday)
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def iterweekdays(self):
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"""
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Return an iterator for one week of weekday numbers starting with the
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configured first one.
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"""
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for i in range(self.firstweekday, self.firstweekday + 7):
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yield i%7
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def itermonthdates(self, year, month):
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"""
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Return an iterator for one month. The iterator will yield datetime.date
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values and will always iterate through complete weeks, so it will yield
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dates outside the specified month.
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"""
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for y, m, d in self.itermonthdays3(year, month):
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yield datetime.date(y, m, d)
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def itermonthdays(self, year, month):
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"""
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Like itermonthdates(), but will yield day numbers. For days outside
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the specified month the day number is 0.
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"""
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day1, ndays = monthrange(year, month)
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days_before = (day1 - self.firstweekday) % 7
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yield from repeat(0, days_before)
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yield from range(1, ndays + 1)
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days_after = (self.firstweekday - day1 - ndays) % 7
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yield from repeat(0, days_after)
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def itermonthdays2(self, year, month):
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"""
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Like itermonthdates(), but will yield (day number, weekday number)
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tuples. For days outside the specified month the day number is 0.
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"""
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for i, d in enumerate(self.itermonthdays(year, month), self.firstweekday):
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yield d, i % 7
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def itermonthdays3(self, year, month):
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"""
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Like itermonthdates(), but will yield (year, month, day) tuples. Can be
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used for dates outside of datetime.date range.
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"""
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day1, ndays = monthrange(year, month)
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days_before = (day1 - self.firstweekday) % 7
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days_after = (self.firstweekday - day1 - ndays) % 7
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y, m = prevmonth(year, month)
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end = monthlen(y, m) + 1
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for d in range(end-days_before, end):
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yield y, m, d
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for d in range(1, ndays + 1):
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yield year, month, d
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y, m = nextmonth(year, month)
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for d in range(1, days_after + 1):
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yield y, m, d
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def itermonthdays4(self, year, month):
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"""
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Like itermonthdates(), but will yield (year, month, day, day_of_week) tuples.
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Can be used for dates outside of datetime.date range.
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"""
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for i, (y, m, d) in enumerate(self.itermonthdays3(year, month)):
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yield y, m, d, (self.firstweekday + i) % 7
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def monthdatescalendar(self, year, month):
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"""
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Return a matrix (list of lists) representing a month's calendar.
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Each row represents a week; week entries are datetime.date values.
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"""
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dates = list(self.itermonthdates(year, month))
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return [ dates[i:i+7] for i in range(0, len(dates), 7) ]
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def monthdays2calendar(self, year, month):
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"""
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Return a matrix representing a month's calendar.
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Each row represents a week; week entries are
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(day number, weekday number) tuples. Day numbers outside this month
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are zero.
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"""
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days = list(self.itermonthdays2(year, month))
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return [ days[i:i+7] for i in range(0, len(days), 7) ]
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def monthdayscalendar(self, year, month):
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"""
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Return a matrix representing a month's calendar.
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Each row represents a week; days outside this month are zero.
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"""
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days = list(self.itermonthdays(year, month))
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return [ days[i:i+7] for i in range(0, len(days), 7) ]
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def yeardatescalendar(self, year, width=3):
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"""
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Return the data for the specified year ready for formatting. The return
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value is a list of month rows. Each month row contains up to width months.
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Each month contains between 4 and 6 weeks and each week contains 1-7
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days. Days are datetime.date objects.
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"""
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months = [
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self.monthdatescalendar(year, i)
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for i in range(January, January+12)
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]
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return [months[i:i+width] for i in range(0, len(months), width) ]
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def yeardays2calendar(self, year, width=3):
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"""
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Return the data for the specified year ready for formatting (similar to
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yeardatescalendar()). Entries in the week lists are
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(day number, weekday number) tuples. Day numbers outside this month are
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zero.
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"""
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months = [
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self.monthdays2calendar(year, i)
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for i in range(January, January+12)
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]
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return [months[i:i+width] for i in range(0, len(months), width) ]
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def yeardayscalendar(self, year, width=3):
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"""
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Return the data for the specified year ready for formatting (similar to
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yeardatescalendar()). Entries in the week lists are day numbers.
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Day numbers outside this month are zero.
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"""
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months = [
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self.monthdayscalendar(year, i)
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for i in range(January, January+12)
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]
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return [months[i:i+width] for i in range(0, len(months), width) ]
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class TextCalendar(Calendar):
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"""
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Subclass of Calendar that outputs a calendar as a simple plain text
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similar to the UNIX program cal.
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"""
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def prweek(self, theweek, width):
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"""
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Print a single week (no newline).
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"""
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print(self.formatweek(theweek, width), end='')
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def formatday(self, day, weekday, width):
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"""
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Returns a formatted day.
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"""
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if day == 0:
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s = ''
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else:
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s = '%2i' % day # right-align single-digit days
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return s.center(width)
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def formatweek(self, theweek, width):
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"""
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Returns a single week in a string (no newline).
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"""
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return ' '.join(self.formatday(d, wd, width) for (d, wd) in theweek)
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def formatweekday(self, day, width):
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"""
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Returns a formatted week day name.
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"""
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if width >= 9:
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names = day_name
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else:
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names = day_abbr
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return names[day][:width].center(width)
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def formatweekheader(self, width):
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"""
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Return a header for a week.
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"""
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return ' '.join(self.formatweekday(i, width) for i in self.iterweekdays())
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def formatmonthname(self, theyear, themonth, width, withyear=True):
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"""
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Return a formatted month name.
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"""
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s = month_name[themonth]
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if withyear:
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s = "%s %r" % (s, theyear)
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return s.center(width)
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def prmonth(self, theyear, themonth, w=0, l=0):
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"""
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Print a month's calendar.
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"""
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print(self.formatmonth(theyear, themonth, w, l), end='')
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def formatmonth(self, theyear, themonth, w=0, l=0):
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"""
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Return a month's calendar string (multi-line).
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"""
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w = max(2, w)
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l = max(1, l)
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s = self.formatmonthname(theyear, themonth, 7 * (w + 1) - 1)
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s = s.rstrip()
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s += '\n' * l
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s += self.formatweekheader(w).rstrip()
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s += '\n' * l
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for week in self.monthdays2calendar(theyear, themonth):
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s += self.formatweek(week, w).rstrip()
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s += '\n' * l
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return s
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def formatyear(self, theyear, w=2, l=1, c=6, m=3):
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"""
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Returns a year's calendar as a multi-line string.
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"""
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w = max(2, w)
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l = max(1, l)
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c = max(2, c)
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colwidth = (w + 1) * 7 - 1
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v = []
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a = v.append
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a(repr(theyear).center(colwidth*m+c*(m-1)).rstrip())
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a('\n'*l)
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header = self.formatweekheader(w)
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for (i, row) in enumerate(self.yeardays2calendar(theyear, m)):
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# months in this row
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months = range(m*i+1, min(m*(i+1)+1, 13))
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a('\n'*l)
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names = (self.formatmonthname(theyear, k, colwidth, False)
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for k in months)
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a(formatstring(names, colwidth, c).rstrip())
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a('\n'*l)
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headers = (header for k in months)
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a(formatstring(headers, colwidth, c).rstrip())
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a('\n'*l)
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# max number of weeks for this row
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height = max(len(cal) for cal in row)
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for j in range(height):
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weeks = []
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for cal in row:
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if j >= len(cal):
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weeks.append('')
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else:
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weeks.append(self.formatweek(cal[j], w))
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a(formatstring(weeks, colwidth, c).rstrip())
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a('\n' * l)
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return ''.join(v)
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def pryear(self, theyear, w=0, l=0, c=6, m=3):
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"""Print a year's calendar."""
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print(self.formatyear(theyear, w, l, c, m), end='')
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class HTMLCalendar(Calendar):
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"""
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This calendar returns complete HTML pages.
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"""
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# CSS classes for the day <td>s
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cssclasses = ["mon", "tue", "wed", "thu", "fri", "sat", "sun"]
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# CSS classes for the day <th>s
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cssclasses_weekday_head = cssclasses
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# CSS class for the days before and after current month
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cssclass_noday = "noday"
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# CSS class for the month's head
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cssclass_month_head = "month"
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# CSS class for the month
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cssclass_month = "month"
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# CSS class for the year's table head
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cssclass_year_head = "year"
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# CSS class for the whole year table
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cssclass_year = "year"
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def formatday(self, day, weekday):
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"""
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Return a day as a table cell.
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"""
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if day == 0:
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# day outside month
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return '<td class="%s"> </td>' % self.cssclass_noday
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else:
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return '<td class="%s">%d</td>' % (self.cssclasses[weekday], day)
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def formatweek(self, theweek):
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"""
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Return a complete week as a table row.
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"""
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s = ''.join(self.formatday(d, wd) for (d, wd) in theweek)
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return '<tr>%s</tr>' % s
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def formatweekday(self, day):
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"""
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Return a weekday name as a table header.
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"""
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return '<th class="%s">%s</th>' % (
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self.cssclasses_weekday_head[day], day_abbr[day])
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def formatweekheader(self):
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"""
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Return a header for a week as a table row.
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"""
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s = ''.join(self.formatweekday(i) for i in self.iterweekdays())
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return '<tr>%s</tr>' % s
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def formatmonthname(self, theyear, themonth, withyear=True):
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"""
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Return a month name as a table row.
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"""
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if withyear:
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s = '%s %s' % (month_name[themonth], theyear)
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else:
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s = '%s' % month_name[themonth]
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return '<tr><th colspan="7" class="%s">%s</th></tr>' % (
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self.cssclass_month_head, s)
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def formatmonth(self, theyear, themonth, withyear=True):
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"""
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Return a formatted month as a table.
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"""
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v = []
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a = v.append
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a('<table border="0" cellpadding="0" cellspacing="0" class="%s">' % (
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self.cssclass_month))
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a('\n')
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a(self.formatmonthname(theyear, themonth, withyear=withyear))
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a('\n')
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a(self.formatweekheader())
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a('\n')
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for week in self.monthdays2calendar(theyear, themonth):
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a(self.formatweek(week))
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a('\n')
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a('</table>')
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a('\n')
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return ''.join(v)
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def formatyear(self, theyear, width=3):
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"""
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Return a formatted year as a table of tables.
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"""
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v = []
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a = v.append
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width = max(width, 1)
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a('<table border="0" cellpadding="0" cellspacing="0" class="%s">' %
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self.cssclass_year)
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a('\n')
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a('<tr><th colspan="%d" class="%s">%s</th></tr>' % (
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width, self.cssclass_year_head, theyear))
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for i in range(January, January+12, width):
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# months in this row
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months = range(i, min(i+width, 13))
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a('<tr>')
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for m in months:
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a('<td>')
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a(self.formatmonth(theyear, m, withyear=False))
|
|
a('</td>')
|
|
a('</tr>')
|
|
a('</table>')
|
|
return ''.join(v)
|
|
|
|
def formatyearpage(self, theyear, width=3, css='calendar.css', encoding=None):
|
|
"""
|
|
Return a formatted year as a complete HTML page.
|
|
"""
|
|
if encoding is None:
|
|
encoding = sys.getdefaultencoding()
|
|
v = []
|
|
a = v.append
|
|
a('<?xml version="1.0" encoding="%s"?>\n' % encoding)
|
|
a('<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">\n')
|
|
a('<html>\n')
|
|
a('<head>\n')
|
|
a('<meta http-equiv="Content-Type" content="text/html; charset=%s" />\n' % encoding)
|
|
if css is not None:
|
|
a('<link rel="stylesheet" type="text/css" href="%s" />\n' % css)
|
|
a('<title>Calendar for %d</title>\n' % theyear)
|
|
a('</head>\n')
|
|
a('<body>\n')
|
|
a(self.formatyear(theyear, width))
|
|
a('</body>\n')
|
|
a('</html>\n')
|
|
return ''.join(v).encode(encoding, "xmlcharrefreplace")
|
|
|
|
|
|
class different_locale:
|
|
def __init__(self, locale):
|
|
self.locale = locale
|
|
|
|
def __enter__(self):
|
|
self.oldlocale = _locale.getlocale(_locale.LC_TIME)
|
|
_locale.setlocale(_locale.LC_TIME, self.locale)
|
|
|
|
def __exit__(self, *args):
|
|
_locale.setlocale(_locale.LC_TIME, self.oldlocale)
|
|
|
|
|
|
class LocaleTextCalendar(TextCalendar):
|
|
"""
|
|
This class can be passed a locale name in the constructor and will return
|
|
month and weekday names in the specified locale. If this locale includes
|
|
an encoding all strings containing month and weekday names will be returned
|
|
as unicode.
|
|
"""
|
|
|
|
def __init__(self, firstweekday=0, locale=None):
|
|
TextCalendar.__init__(self, firstweekday)
|
|
if locale is None:
|
|
locale = _locale.getdefaultlocale()
|
|
self.locale = locale
|
|
|
|
def formatweekday(self, day, width):
|
|
with different_locale(self.locale):
|
|
if width >= 9:
|
|
names = day_name
|
|
else:
|
|
names = day_abbr
|
|
name = names[day]
|
|
return name[:width].center(width)
|
|
|
|
def formatmonthname(self, theyear, themonth, width, withyear=True):
|
|
with different_locale(self.locale):
|
|
s = month_name[themonth]
|
|
if withyear:
|
|
s = "%s %r" % (s, theyear)
|
|
return s.center(width)
|
|
|
|
|
|
class LocaleHTMLCalendar(HTMLCalendar):
|
|
"""
|
|
This class can be passed a locale name in the constructor and will return
|
|
month and weekday names in the specified locale. If this locale includes
|
|
an encoding all strings containing month and weekday names will be returned
|
|
as unicode.
|
|
"""
|
|
def __init__(self, firstweekday=0, locale=None):
|
|
HTMLCalendar.__init__(self, firstweekday)
|
|
if locale is None:
|
|
locale = _locale.getdefaultlocale()
|
|
self.locale = locale
|
|
|
|
def formatweekday(self, day):
|
|
with different_locale(self.locale):
|
|
s = day_abbr[day]
|
|
return '<th class="%s">%s</th>' % (self.cssclasses[day], s)
|
|
|
|
def formatmonthname(self, theyear, themonth, withyear=True):
|
|
with different_locale(self.locale):
|
|
s = month_name[themonth]
|
|
if withyear:
|
|
s = '%s %s' % (s, theyear)
|
|
return '<tr><th colspan="7" class="month">%s</th></tr>' % s
|
|
|
|
|
|
# Support for old module level interface
|
|
c = TextCalendar()
|
|
|
|
firstweekday = c.getfirstweekday
|
|
|
|
def setfirstweekday(firstweekday):
|
|
if not MONDAY <= firstweekday <= SUNDAY:
|
|
raise IllegalWeekdayError(firstweekday)
|
|
c.firstweekday = firstweekday
|
|
|
|
monthcalendar = c.monthdayscalendar
|
|
prweek = c.prweek
|
|
week = c.formatweek
|
|
weekheader = c.formatweekheader
|
|
prmonth = c.prmonth
|
|
month = c.formatmonth
|
|
calendar = c.formatyear
|
|
prcal = c.pryear
|
|
|
|
|
|
# Spacing of month columns for multi-column year calendar
|
|
_colwidth = 7*3 - 1 # Amount printed by prweek()
|
|
_spacing = 6 # Number of spaces between columns
|
|
|
|
|
|
def format(cols, colwidth=_colwidth, spacing=_spacing):
|
|
"""Prints multi-column formatting for year calendars"""
|
|
print(formatstring(cols, colwidth, spacing))
|
|
|
|
|
|
def formatstring(cols, colwidth=_colwidth, spacing=_spacing):
|
|
"""Returns a string formatted from n strings, centered within n columns."""
|
|
spacing *= ' '
|
|
return spacing.join(c.center(colwidth) for c in cols)
|
|
|
|
|
|
EPOCH = 1970
|
|
_EPOCH_ORD = datetime.date(EPOCH, 1, 1).toordinal()
|
|
|
|
|
|
def timegm(tuple):
|
|
"""Unrelated but handy function to calculate Unix timestamp from GMT."""
|
|
year, month, day, hour, minute, second = tuple[:6]
|
|
days = datetime.date(year, month, 1).toordinal() - _EPOCH_ORD + day - 1
|
|
hours = days*24 + hour
|
|
minutes = hours*60 + minute
|
|
seconds = minutes*60 + second
|
|
return seconds
|
|
|
|
|
|
def main(args):
|
|
import argparse
|
|
parser = argparse.ArgumentParser()
|
|
textgroup = parser.add_argument_group('text only arguments')
|
|
htmlgroup = parser.add_argument_group('html only arguments')
|
|
textgroup.add_argument(
|
|
"-w", "--width",
|
|
type=int, default=2,
|
|
help="width of date column (default 2)"
|
|
)
|
|
textgroup.add_argument(
|
|
"-l", "--lines",
|
|
type=int, default=1,
|
|
help="number of lines for each week (default 1)"
|
|
)
|
|
textgroup.add_argument(
|
|
"-s", "--spacing",
|
|
type=int, default=6,
|
|
help="spacing between months (default 6)"
|
|
)
|
|
textgroup.add_argument(
|
|
"-m", "--months",
|
|
type=int, default=3,
|
|
help="months per row (default 3)"
|
|
)
|
|
htmlgroup.add_argument(
|
|
"-c", "--css",
|
|
default="calendar.css",
|
|
help="CSS to use for page"
|
|
)
|
|
parser.add_argument(
|
|
"-L", "--locale",
|
|
default=None,
|
|
help="locale to be used from month and weekday names"
|
|
)
|
|
parser.add_argument(
|
|
"-e", "--encoding",
|
|
default=None,
|
|
help="encoding to use for output"
|
|
)
|
|
parser.add_argument(
|
|
"-t", "--type",
|
|
default="text",
|
|
choices=("text", "html"),
|
|
help="output type (text or html)"
|
|
)
|
|
parser.add_argument(
|
|
"year",
|
|
nargs='?', type=int,
|
|
help="year number (1-9999)"
|
|
)
|
|
parser.add_argument(
|
|
"month",
|
|
nargs='?', type=int,
|
|
help="month number (1-12, text only)"
|
|
)
|
|
|
|
options = parser.parse_args(args[1:])
|
|
|
|
if options.locale and not options.encoding:
|
|
parser.error("if --locale is specified --encoding is required")
|
|
sys.exit(1)
|
|
|
|
locale = options.locale, options.encoding
|
|
|
|
if options.type == "html":
|
|
if options.locale:
|
|
cal = LocaleHTMLCalendar(locale=locale)
|
|
else:
|
|
cal = HTMLCalendar()
|
|
encoding = options.encoding
|
|
if encoding is None:
|
|
encoding = sys.getdefaultencoding()
|
|
optdict = dict(encoding=encoding, css=options.css)
|
|
write = sys.stdout.buffer.write
|
|
if options.year is None:
|
|
write(cal.formatyearpage(datetime.date.today().year, **optdict))
|
|
elif options.month is None:
|
|
write(cal.formatyearpage(options.year, **optdict))
|
|
else:
|
|
parser.error("incorrect number of arguments")
|
|
sys.exit(1)
|
|
else:
|
|
if options.locale:
|
|
cal = LocaleTextCalendar(locale=locale)
|
|
else:
|
|
cal = TextCalendar()
|
|
optdict = dict(w=options.width, l=options.lines)
|
|
if options.month is None:
|
|
optdict["c"] = options.spacing
|
|
optdict["m"] = options.months
|
|
if options.year is None:
|
|
result = cal.formatyear(datetime.date.today().year, **optdict)
|
|
elif options.month is None:
|
|
result = cal.formatyear(options.year, **optdict)
|
|
else:
|
|
result = cal.formatmonth(options.year, options.month, **optdict)
|
|
write = sys.stdout.write
|
|
if options.encoding:
|
|
result = result.encode(options.encoding)
|
|
write = sys.stdout.buffer.write
|
|
write(result)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main(sys.argv)
|