python inheritance

1# =============================================================================
2# Inhertance
3# =============================================================================
4class A:
5    def feature1(self):
6        print('Feature 1 in process...')
7    def feature2(self):
8        print('Feature 2 in process...')       #Pt.1
9        
10class B:
11    def feature3(self):
12        print('Feature 3 in process...')
13    def feature4(self):
14        print ('Feature 4 in process...')
15        
16a1 = A() 
17
18a1.feature1()
19a1.feature2()
20
21a2 = B()
22
23a2.feature3()
24a2.feature4()
25# THE ABOVE PROGRAM IS A PROGRAM WITHOUT USING INHERITANCE
26        
27# WITH THE USE OF INHERITANCE IS BELOW
28class A:
29    def feature1(self):
30        print('Feature 1 in process...')    
31    def feature2(self):
32        print('Feature 2 in process...')
33        
34class B(A):
35    def feature3(self):
36        print('Feature 3 in process...')    # Pt.2
37    def feature4(self):
38        print ('Feature 4 in process...')
39        
40a1 = A() 
41
42a1.feature1()
43a1.feature2()
44
45a2 = B()
46
47a2.feature3()
48a2.feature4()
49
50
51# NOW TO CHECK OUT THE DIFFERENCE BETWEEN Pt.1
52# AND Pt.2 TRY RUNNIG THE CODE ON THE BASIS OF
53# INHERITANCE, IN OTHER WORDS TRY RUNNING ONLY 
54# B CLASS IN Pt.2 AND THEN RUN ONLY a2
55# YOU WILL SEE A DIFFERENCE IN THE RUNNING OF 
56# ONLY a2,,,, IT WILL STILL SHOW THAT FEATURE 3
57# AND 4 IS IN PROCESS,, THIS MEANS THAT B IS THE

1# creating parent class
2class Parent:
3    BloodGroup = 'A'
4    Gender = 'Male'
5    Hobby = 'Chess'
6    
7# creating child class
8class Child(Parent): # inheriting parent class
9    BloodGroup = 'A+'
10    Gender = 'Female
11    
12    def print_data():
13        print(BloodGroup, Gender, Hobby)
14    
15# creating object for child class
16child1 = Child()
17# as child1 inherits it's parent's hobby printed data would be it's parent's
18child1.print_data()
19  

1class Person:  
2    name = ""  
3
4    def __init__(self, personName):  
5        self.name = personName  
6  
7    def showName(self):  
8        print(self.name)  
9  
10class Student(Person): 				# Student inherits from Person superclass
11    studentClass = ""  
12
13    def __init__(self, studentName, studentClass):  
14        Person.__init__(self, studentName)		# superclass constructor
15        self.studentClass = studentClass  		# Student class specific
16  
17    def getStudentClass(self):  
18        return self.studentClass  
19  
20  
21person1 = Person("Dave")
22person1.showName()                  # Dave
23student1 = Student("Mary", "Maths")
24print(student1.getStudentClass())   # Maths
25student1.showName()                 # Mary

1class Robot:
2    
3    def __init__(self, name):
4        self.name = name
5        
6    def say_hi(self):
7        print("Hi, I am " + self.name)
8        
9class PhysicianRobot(Robot):
10
11    def say_hi(self):
12        print("Everything will be okay! ") 
13        print(self.name + " takes care of you!")
14
15y = PhysicianRobot("James")
16y.say_hi()
17

1class Parent:
2
3    def abc(self):
4        print("Parent")
5
6class LeftChild(Parent):
7
8    def pqr(self):
9        print("Left Child")
10
11class RightChild(Parent):
12
13    def stu(self):
14        print("Right Child")
15
16class GrandChild(LeftChild,RightChild):
17
18    def xyz(self):
19        print("Grand Child")
20
21obj1 = LeftChild()
22obj2 = RightChild()
23obj3 = GrandChild()
24obj1.abc()
25obj2.abc()
26obj3.abc()

1class Robot:
2    
3    def __init__(self, name):
4        self.name = name
5        
6    def say_hi(self):
7        print("Hi, I am " + self.name)
8        
9class PhysicianRobot(Robot):
10    pass
11
12x = Robot("Marvin")
13y = PhysicianRobot("James")
14
15print(x, type(x))
16print(y, type(y))
17
18y.say_hi()
19