Python Object Learning

Introduction to Python objects

Python uses the object model to store data, and constructs any type of value as an object, although Python is used as an object-oriented programming language, but scripts that do not use any classes and instances are completely written. All Python objects have three properties: Identity, type, value

Identity:

Each object has a unique identity, and the identity of any object can be used with the built-in function ID (), which can be thought of as the memory address of the object, which you rarely use.

Type:

The type of the object determines what type of value the object can hold, what actions it can take, and what rules to follow, which can be used to view the type of the Python object using the built-in function type (), which is not a simple string returned by type ().

Value:

object represents the data item.

These three attributes are assigned when the object is created, except for the value, the other two features are read-only, and the type of the object can be changed for the new type and class.

Can the value of an object be changed?

A: If the object supports the update operation, then its value can be changed, otherwise it is read-only, whether the value of the object can be changed to be called a mutability, Python has a series of data types, if necessary, you can customize the creation of custom types to meet your needs.

Properties of the Object

Some Python objects have properties, values, or related executable code, such as methods, that use. To access the properties of an object, including the name of the object, and the objects that contain the data properties include:

Class, instance, module, plural, file

　　

Python Object Learning