What is the difference between class attributes and instance attributes? What is a special method attribute? Name at least four. What is the difference between __str__ and __repr__? What is a private...

What is the difference between class attributes and instance attributes? What is a special method attribute? Name at least four. What is the difference between __str__ and __repr__? What is a private method? Are they really private in Python? What is self? Inside a class definition, what is the difference between self.var = 0 and var = 0?