37 lines
842 B
Python
37 lines
842 B
Python
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class WeekDayError(Exception):
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pass
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class Weeker:
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__GIORNI = ['lun', 'mar', 'mer', 'gio', 'ven', 'sab', 'dom']
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def __init__(self, day):
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if day not in Weeker.__GIORNI:
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raise WeekDayError("Giorno non valido: " + day)
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self.__day_index = Weeker.__GIORNI.index(day)
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def __str__(self):
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return Weeker.__GIORNI[self.__day_index].capitalize()
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def add_days(self, n):
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self.__day_index = (self.__day_index + n) % 7
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def subtract_days(self, n):
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self.__day_index = (self.__day_index - n) % 7
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# --- TEST ---
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try:
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weekday = Weeker('lun')
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print(weekday)
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weekday.add_days(15)
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print(weekday)
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weekday.subtract_days(23)
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print(weekday)
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weekday = Weeker('lunedì')
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except WeekDayError:
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print("Mi dispiace, non posso soddisfare la sua richiesta.")
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