Q on classes

[deanhystad]

It is saying 4 because it requires 4. Clock.set_time() is an instance method. The first argument must be an instance of Clock. You are treating it like a static method.

I would rename this method __str__:

    def get_time(self):
        return '{:02d}:{:02d}:{:02d}'.format(self.hours, self.minutes, self.seconds)

I would also use f'string formatting because format() is old and not great, and also because you use f'string formatting everywhere else in your program.

    def __str__(self):
        return f'{self.hours:02d}:{self.minutes:02d}:{self.seconds:02d}'

But I would not use f'string formatting here.

print(f'Updating RTC...')

And I would use unpacking here:

            year = cet[0]
            month = cet[1]
            day = cet[2]
            hours = cet[3]
            minutes = cet[4]
            seconds = cet[5]
            weekday = cet[6]

year, month, day, hours, minutes, seconds, weekday, *_ = cet