Question

For example:

class Car:
  pass
jeep = Car()
jeep.color = 'blue'

This is perfectly legal and runs fine. I understand that python is pretty dynamic but doesn’t this violate some principle of oop?

Answer 1

http://docs.python.org/tutorial/classes.html#odds-and-ends

To dynamically set up the fields and value when they can only be known at run time.

Python does not prevent you from dynamically creating instance properties, though you can decide not to do so if you have no very good reason to do so. Python is quite a powerful language, though care must be excercise to avoid abusing this sort of power to do crazy things with it’s flexibility.