N = 7
PITCHES = ["до", "ре", "ми", "фа", "соль", "ля", "си"]
LONG_PITCHES = ["до-о", "ре-э", "ми-и", "фа-а", "со-оль", "ля-а", "си-и"]
INTERVALS = ["прима", "секунда", "терция", "кварта", "квинта", "секста", "септима"]


class Note:
    def long_note(self, note):
        self.note = LONG_PITCHES[PITCHES.index(self.note)]
        return self.note

    def __str__(self):
        if self.is_long is True:
            self.note = self.long_note(self.note)

    def __init__(self, note=None, is_long=False):
        self.note = note
        self.is_long = is_long

    def __eq__(self, other):
        if PITCHES.index(self.note) == PITCHES.index(other.note):
            return True
        else:
            return False

    def __lt__(self, other):
        if PITCHES.index(self.note) < PITCHES.index(other.note):
            return True
        else:
            return False

    def __rt__(self, other):
        if PITCHES.index(self.note) > PITCHES.index(other.note):
            return True
        else:
            return False

    def __le__(self, other):
        if PITCHES.index(self.note) <= PITCHES.index(other.note):
            return True
        else:
            return False

    def __re__(self, other):
        if PITCHES.index(self.note) >= PITCHES.index(other.note):
            return True
        else:
            return False

    def __rlshift__(self, shift):
        self.shift = shift
        self.index = PITCHES.index(self.note)
        self.note = PITCHES.index(self.index - shift % 7)
        return self.note

    def __rrshift__(self, shift):
        self.shift = shift
        self.index = PITCHES.index(self.note)
        self.note = PITCHES.index(self.index + shift % 7)
        return self.note


fa2 = Note("фа")
la = Note("ля", True)
print(la > 1)
print(la >> 2)
x = fa2 << 4
print(x)