Reply To: Classes and Objects in Python

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#1911
Erik van Baaren
Keymaster

Let me put this another way. In your code example, you let the definition of car directly follow the class definition. I mean the line car = Car().

If you copy-paste or enter it like that in the REPL, it won’t work. You need to keep hitting enter after the class definition (effectively two times) until you get a new prompt (the >>>).  So if I do this on my pc, it looks like this:

Python 3.8.5 (default, Jul 28 2020, 12:59:40)
[GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> class Car:
...     speed = 0
...     started = False
...
...     def start(self):
...         self.started = True
...         print("Car started, let's ride!")
...
...     def increase_speed(self, delta):
...         if self.started:
...             self.speed = self.speed + delta
...             print('Vrooooom!')
...         else:
...             print("You need to start the car first")
...
...     def stop(self):
...         self.speed = 0
...         print('Halting')
...
>>> car = Car()
>>> car.increase_speed(10)
You need to start the car first
>>>

As mentioned below, I’d suggest staying away from files for now and try to get this working in the REPL first.

Hope that clears it up!