Exercício 10-07:

##############################################################################
# Parte do livro Introdução à Programação com Python
# Autor: Nilo Ney Coutinho Menezes
# Editora Novatec (c) 2010-2024
# Quarta Edição - Março/2024 - ISBN 978-85-7522-886-9
#
# Site: https://python.nilo.pro.br/
#
# Arquivo: capitulo 10/exercicio-10-07.py
##############################################################################
class Televisão:
    def __init__(self, min=2, max=14):
        self.ligada = False
        self.canal = min
        self.cmin = min
        self.cmax = max

    def muda_canal_para_baixo(self):
        if not self.ligada:
            return
        if self.canal - 1 >= self.cmin:
            self.canal -= 1
        else:
            self.canal = self.cmax

    def muda_canal_para_cima(self):
        if not self.ligada:
            return
        if self.canal + 1 <= self.cmax:
            self.canal += 1
        else:
            self.canal = self.cmin