The cause of Cushing's syndrome boils down to: Your body is exposed to too much cortisol. There are a few ways that this over-exposure can happen, including taking certain medications and having a tumor on your pituitary gland or adrenal gland.
Difference between class and instance variables. Now, it should be clear what the difference between instance and class variables is. Class variables only have one copy that is shared by all the different objects of a class, whereas every object has itâs own personal copy of an instance variable. So, instance variables across different objects can have different values whereas class variables across different objects can have only one value.
Methods and attributes defined as static can be used without an instance of a class being created. In other words, static variables belong to the class itself and there is only one instance of each static variable, which is shared among all the objects of that class. With static methods you can directly use static variables and other static methods. Instance variables are supposed to describe one particular object and instance methods represent actions that this particular object can take.