Define class attributes and object attributes in python

In python, variables are of no type and can be bound to any type, but cannot be declared in syntax.

So how can we name a variable?

F = None

In this way, we bind a variable to each None type, and we can re-bind other types at any time. In this way, we have achieved the effect of preemptible variables.

How do I define the attributes and object attributes of a class?

If you have some knowledge about OO, you should know that the class attributes belong to the class as a whole, and the image attributes belong to specific image instances (view the implementation of gtk's Image System for further understanding ).

Class MyClass: cName = None def _ init _ (self): self. oName = "name"

In this way, cName is the class attribute, while oName is the object attribute.