calculator_refactored.py

class Calculator:
    def __init__(self):
        self._history = []

    @property
    def history(self):
        return self._history

    def _add_history_entry(
            self, num1: int, num2: int, operation: str, result: int
    ):
        self._history.append({
            'num1': num1,
            'num2': num2,
            'operation': operation,
            'result': result
        })

    def sum_numbers(self, num1: int, num2: int):
        result = num1 + num2
        self._add_history_entry(num1, num2, '+', result)

        return result

    def subtract_number(self, num1: int, num2: int):
        result = num1 - num2
        self._add_history_entry(num1, num2, '-', result)

        return result


class calcu_lator(Calculator):
    pass


calculator = Calculator()
exit = False
while not exit:
    print('Operação Soma')
    num1 = int(input('Operador 1: '))
    num2 = int(input('Operador 2: '))

    if num1 != 0 and num2 != 0:
        print(f'Resultado {calculator.sum_numbers(num1, num2)}\n')
    else:
        print('\Histórico de operações\n')
        for entry in calculator.history:
            num1 = entry['num1']
            operation = entry['operation']
            num2 = entry['num2']
            result = entry['result']
            print(f'{num1} {operation} {num2} = {result}')

        exit = True


calculator2 = calcu_lator()
exit = False
while not exit:
    print('Operação Subtração')
    num1 = int(input('Operador 1: '))
    num2 = int(input('Operador 2: '))

    if num1 != 0 and num2 != 0:
        print(f'Resultado {calculator2.subtract_number(num1, num2)}\n')
    else:
        print('\nOperations history\n')
        for entry in calculator2.history:
            num1 = entry['num1']
            operation = entry['operation']
            num2 = entry['num2']
            result = entry['result']
            print(f'{num1} {operation} {num2} = {result}')

        exit = True

calculator_refactoring.py

class calcu_lator:
    def __init__(self):
        self._history = []

    @property
    def history(self):
        return self._history

    def _add_history_entry(
            self, num1: int, num2: int, operation: str, result: int
    ):
        self._history.append({
            'num1': num1,
            'num2': num2,
            'operation': operation,
            'result': result
        })

    def sum_numbers(self, num1: int, num2: int):
        result = num1 + num2
        self._add_history_entry(num1, num2, '+', result)

        return result

    def subtract_number(self, num1: int, num2: int):
        result = num1 - num2
        self._add_history_entry(num1, num2, '-', result)

        return result


calculator = Calculator()
exit = False
while not exit:
    print('Operação Soma')
    num1 = int(input('Operador 1: '))
    num2 = int(input('Operador 2: '))

    if num1 != 0 and num2 != 0:
        print(f'Resultado {calculator.sum_numbers(num1, num2)}\n')
    else:
        print('\Histórico de operações\n')
        for entry in calculator.history:
            num1 = entry['num1']
            operation = entry['operation']
            num2 = entry['num2']
            result = entry['result']
            print(f'{num1} {operation} {num2} = {result}')

        exit = True


calculator2 = calcu_lator()
exit = False
while not exit:
    print('Operação Subtração')
    num1 = int(input('Operador 1: '))
    num2 = int(input('Operador 2: '))

    if num1 != 0 and num2 != 0:
        print(f'Resultado {calculator2.subtract_number(num1, num2)}\n')
    else:
        print('\nOperations history\n')
        for entry in calculator2.history:
            num1 = entry['num1']
            operation = entry['operation']
            num2 = entry['num2']
            result = entry['result']
            print(f'{num1} {operation} {num2} = {result}')

        exit = True