class ContaBancaria:
    def __init__(self, saldo):
        self.__saldo = saldo # atributo privado __saldo

    def depositar(self, valor):
        self.__saldo += valor

    def ver_saldo(self):
        return self.__saldo

conta = ContaBancaria(1000)
conta.depositar(500)
print(conta.ver_saldo())

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