Python Full Stack Development * 18 Object-oriented Knowledge points summary * 180530

18 Object-oriented first knowledge 1
Class Person:
Level= "Advanced Animals"
Mind= "Have thought"
def __init__ (Self,name,age,gent,area,hobby):
Self.name=name
Self.age=age
Self.gent=gent
Self.area=area
Self.hobby=hobby
Print ("__init__")
Pass
def walk (self):
Pass
Def eat (self):
Pass
Aq=person ("Q", "16", "Male", "China", "bragging")
Print (aq.__dict__)
I. Class
1. A class of things with the same attributes and skills.
2. Structure of the class (two parts)
(1). Static variable (field)
Level= "Advanced Animals"
Mind= "Have thought"
(2). Dynamic Methods (functions)
def __init__ (Self,name,age,gent,area,hobby):
Self.name=name
Self.age=age
Self.gent=gent
Self.area=area
Self.hobby=hobby
Print ("__init__")
Pass
def walk (self):
Pass
Def eat (self):
Pass

3: Class name call variable, method
(1). Class name View all variables (fields) in a class, methods (functions)
The print (class name. __dict__) #类中所有的东西 attribute method can only be used to find and delete items in the class.
(2). Class name lookup static variable (field)
Common: By class name. Variable name
Check: print (Person.mind)
Add: person.create= "creative"
Change: person.mind= "The Walking Dead"
Delete: Del person.mind
Infrequently used: Print (class name. __dict__[mind])
(3). The operation of the class name on the method (function)
Common: Class name. Method Name (function)
Person.walk (parametric)
Infrequently used: class name. __dict__["Walk"]

Two. Object.
1. The object is the concrete manifestation of the class.
2. Instantiating an Object
Syntax: Class name () is equivalent to instantiating an object
3 Execution Process
(1). Generate an object space; (aq= class name () AQ is an object space)
(2). Automatically executes the __init__ method in the class and passes the object space to self; (Def __init__ (self) passes aq to self)
(3). Execute the __init__ method to add attributes to the object and return the perfect object to the class name.
def __init__ (Self,name,age,gent,area,hobby):
Self.name=name #self. Name In name indicates the name reference to the right of the object property equals sign
Self.age=age
Self.gent=gent
Self.area=area
Self.hobby=hobby
Print ("__init__")
4. Object lookup All properties in an object
Print (aq.__dict__)
5. Static variables in object manipulation objects
Check: object. Name # print (aq.name)
Increment: Object. job= "Student" # aq.job= "Stu"
Delete: Del object. Age
Change: Object. gent= "Male"
6. The static variables in the object operation class can only be queried, cannot be deleted or modified.
The object name. Variable (level) in class # print (Aq.level)

7. Methods in the Object execution class
The object name. Walk () # Aq.walk () # automatically receives object space without having to pass arguments to the self position.

Add: __init__ is called construction mode, you can also append properties when executing a method (temporary)
Print ("__init__")
Self.eye= "Eye"
You can also add properties to an object in the non-__init__ of the class, if you must first perform this method
def walk (self):
Print ("Go on foot")
Self.skincolor= "Skincolor".

Python Full Stack Development * 18 Object-oriented Knowledge points summary * 180530