Is this what you want?
Few udpates in your code:
function model_name() is expected to print the model_name assigned to the car, and as carmodel is parent of cartype, the model info needs to be passed to parent class and store it in self. So initialize cartype with type and model and pass this model to parent class as done in the code below:
class carmodel():
def __init__(self, model):
self.model = model
def model_name(self):
print("Car Model is", self.model)
class cartype(carmodel):
def __init__(self, typ, model):
super().__init__(model)
self.typ = typ
def ctyp(self):
print(self.model, "car type is", self.typ)
car1 = cartype("Sports", "Tesla Plaid")
car1.ctyp()
car1.model_name()Output:
Tesla Plaid car type is Sports Car Model is Tesla Plaid
Here's a reconstruction of your code that you might find useful:-
class carmodel():
def __init__(self, model):
self.model = model
def model_name(self):
return f 'Model={self.model}'
class cartype(carmodel):
def __init__(self, typ, model):
super().__init__(model)
self.typ = typ
def ctyp(self):
return f 'Model={self.model}, type={self.typ}'
car = cartype("Sports", 'Plaid')
print(car.ctyp())
print(car.model_name())Last Updated : 02 Jul, 2020
Output:
COE COE SHIVAM SACHIN 3425 3624 COE
2 days ago First, the variable/method must be public. To get the a variable or call a method from the parent: Script parentScript = this.transform.parent.GetComponent<Script>(); script.parentMethod(); or script.parentVariable There are multiple ways to get the children's scripts. It depends on how many children you have. , Parent class methods can also be called within the overridden methods. This can generally be achieved by two ways. Using Classname: Parent’s class methods can be called by using the Parent classname.method inside the overridden method. , Using Classname: Parent’s class methods can be called by using the Parent classname.method inside the overridden method. Using Super (): Python super () function provides us the facility to refer to the parent class explicitly. , Go to the Connection Window and browse the files from the project location and select the Child package. In order to display the variable value, I am going to add a Script Task in the Child package.
brk1_int_c = str(df1['Unnamed: 1'][aRowNum]) #starts at row 7, 13, 19, 25, 31, 37, 43, 49. addition of 6 brk1_ext_c = str(df1['Unnamed: 2'][aRowNum]) brk2_int_c = str(df1['Unnamed: 1'][bRowNum]) brk2_ext_c = str(df1['Unnamed: 2'][bRowNum])` brk1_int_c = str(df1['Unnamed: 1'][aRowNum]) #starts at row 7, 13, 19, 25, 31, 37, 43, 49. addition of 6 brk1_ext_c = str(df1['Unnamed: 2'][aRowNum]) brk2_int_c = str(df1['Unnamed: 1'][bRowNum]) brk2_ext_c = str(df1['Unnamed: 2'][bRowNum])` global brk1_int_c, brk1_ext_c, brk2_int_c, brk2_ext_cglobal brk1_int_c, brk1_ext_c, brk2_int_c, brk2_ext_cClass variable − A variable that is shared by all instances of a class. Class variables are defined within a class but outside any of the class's methods. Class variables are not used as frequently as instance variables are.,The variable empCount is a class variable whose value is shared among all instances of a this class. This can be accessed as Employee.empCount from inside the class or outside the class.,Instance variable − A variable that is defined inside a method and belongs only to the current instance of a class.,Class − A user-defined prototype for an object that defines a set of attributes that characterize any object of the class. The attributes are data members (class variables and instance variables) and methods, accessed via dot notation.
The class statement creates a new class definition. The name of the class immediately follows the keyword class followed by a colon as follows −
class ClassName:
'Optional class documentation string'
class_suiteFollowing is the example of a simple Python class −
class Employee:
'Common base class for all employees'
empCount = 0
def __init__(self, name, salary):
self.name = name
self.salary = salary
Employee.empCount += 1
def displayCount(self):
print "Total Employee %d" % Employee.empCount
def displayEmployee(self):
print "Name : ", self.name, ", Salary: ", self.salaryTo create instances of a class, you call the class using class name and pass in whatever arguments its __init__ method accepts.
"This would create first object of Employee class"
emp1 = Employee("Zara", 2000)
"This would create second object of Employee class"
emp2 = Employee("Manni", 5000)#!/usr/bin/python
class Employee:
'Common base class for all employees'
empCount = 0
def __init__(self, name, salary):
self.name = name
self.salary = salary
Employee.empCount += 1
def displayCount(self):
print "Total Employee %d" % Employee.empCount
def displayEmployee(self):
print "Name : ", self.name, ", Salary: ", self.salary
"This would create first object of Employee class"
emp1 = Employee("Zara", 2000)
"This would create second object of Employee class"
emp2 = Employee("Manni", 5000)
emp1.displayEmployee()
emp2.displayEmployee()
print "Total Employee %d" % Employee.empCountWhen the above code is executed, it produces the following result −
Name: Zara, Salary: 2000 Name: Manni, Salary: 5000 Total Employee 2
creates a new instance of the class and assigns this object to the local variable x.,The instantiation operation (“calling” a class object) creates an empty object. Many classes like to create objects with instances customized to a specific initial state. Therefore a class may define a special method named __init__(), like this:,Class instantiation uses function notation. Just pretend that the class object is a parameterless function that returns a new instance of the class. For example (assuming the above class):,Generally speaking, instance variables are for data unique to each instance and class variables are for attributes and methods shared by all instances of the class:
def scope_test():
def do_local():
spam = "local spam"
def do_nonlocal():
nonlocal spam
spam = "nonlocal spam"
def do_global():
global spam
spam = "global spam"
spam = "test spam"
do_local()
print("After local assignment:", spam)
do_nonlocal()
print("After nonlocal assignment:", spam)
do_global()
print("After global assignment:", spam)
scope_test()
print("In global scope:", spam)After local assignment: test spam
After nonlocal assignment: nonlocal spam
After global assignment: nonlocal spam
In global scope: global spamclass ClassName:
<statement-1>
.
.
.
<statement-N>class MyClass:
""
"A simple example class"
""
i = 12345
def f(self):
return 'hello world'x = MyClass()
def __init__(self): self.data = []
In the same way, parent class also contains the display method, and also child class also contains the display method, and hence, we call the parent class display method by using the super() function., By using the super() function, we can call the immediate parent class method, and if we want to access the particular superclass method, then we have to use the following two approaches. 1.classname.methodname(self),The output is: In the above example, method1, method2, and method3 are present only in the parent class and not in the child class, and there are no naming conflicts; hence, instead of the super() function, we can access those methods by using self only. But the Constructor is present in both Parent and child class, there is a naming conflict, and hence, we can access the parent class constructor by using the super() function.,The output is: In the above example, parent and child class both contain the name, age, height, and weight variables, but when we call variables by using self, then automatically it calls child class constructor. By using the super() function we can call the name, age, height, and weight from the parent class constructor into the child class constructor.
Parent class members are by default available to the child class, in the child class, we can access the parent class members directly.
If the parent class and child class contains the method with the same name and if we try to access the parent class method in the child class by using the self then, python will throw a recursion error so to overcome from this naming conflict, python provides the function called super() function.
By using the super() function, we can access the parent class members from the child class.
The super() function is a built-in function, which is useful to call the superclass constructor, methods, and variables explicitly from the child class.
Example 1: If we try to access the parent class members from child class then we will get recursion error
class Parent:
def method1(self):
print("Parent Method")
class Child(Parent):
def method1(self):
self.method1()
print("Child Method")
c = Child()
c.method1()The output is:
Example 2: To overcome recursion error we can use the super() function
class Parent:
def method1(self):
print("Parent Method")
class Child(Parent):
def method1(self):
super().method1() # #calling parent method
print("Child Method")
c = Child() # #Calling Child method
c.method1()Example 3: The following demonstrates the parent and child class
class Parent:
a = 10
def __init__(self):
print("Parent constructor")
def method1(self):
print("Parent Instance Method")
@classmethod
def method2(cls):
print("Parent Class Method")
@staticmethod
def method3():
print("Parent Static Method")
class Child(Parent): # #child class constructor will execute
def __init__(self):
print("Child Constructor")
def method1(self):
print(super().a) # #super class variables will execute
super().method1()
super().method2()
super().method3()
super().__init__()
c = Child() # #creating child object
c.method1() # #calling method1 of parent class by using child class referenceThe output is:
Example 4: The following example demonstrates the use of the super() function.
class Person:
def __init__(self, name, age, height, weight):
self.name = name
self.age = age
self.height = height
self.weight = weight
def display(self):
print("Name:", self.name)
print("Age:", self.age)
print("Hieght:", self.height)
print("Weight:", self.weight)
class Student(Person):
def __init__(self, name, age, height, weight, rollno, marks):
self.name = name
self.age = age
self.height = height
self.weight = weight
self.rollno = rollno
self.marks = marks
def display(self):
print("Name:", self.name)
print("Age:", self.age)
print("Hieght:", self.height)
print("Weight:", self.weight)
print("Rollno:", self.rollno)
print("Marks:", self.marks)
s = Student("Revati", 24, 5.6, 50, 46, 98)
s.display()The output is:
In the above example, parent and child class both contain the name, age, height, and weight variables, but when we call variables by using self, then automatically it calls child class constructor.
By using the super() function we can call the name, age, height, and weight from the parent class constructor into the child class constructor.
class Person:
def __init__(self, name, age, height, weight):
self.name = name
self.age = age
self.height = height
self.weight = weight
def display(self):
print("Name:", self.name)
print("Age:", self.age)
print("Hieght:", self.height)
print("Weight:", self.weight)
class Student(Person):
def __init__(self, name, age, height, weight, rollno, marks):
/*calling the parent class constructor from the child class constructor by using the super() function*/
super().__init__(name, age, height, weight)
self.rollno = rollno
self.marks = marks
def display(self):
print("Name:", self.name)
print("Age:", self.age)
print("Hieght:", self.height)
print("Weight:", self.weight)
print("Rollno:", self.rollno)
print("Marks:", self.marks)
s = Student("Revati", 24, 5.6, 50, 46, 98)
s.display()
By using the super() function, we can call the immediate parent class method, and if we want to access the particular superclass method, then we have to use the following two approaches.
1.classname.methodname(self)
A.method1(self) # # This will call the method1 of class A2.super(classname,self).method1
super(D, self).method1 # #This will call method1() of super class of D
Example: The following example demonstrates how to call the method of a particular function
class A:
def method1(self):
print("A Class Method")
class B(A):
def method1(self):
print("B Class Method")
class C(B):
def method1(self):
print("C Class Method")
class D(C):
def method1(self):
print("D Class Method")
class E(D):
def method1(self):
B.method1(self)
e = E()
e.method1()To keep the inheritance of the parent's __init__() function, add a call to the parent's __init__() function:,Inheritance allows us to define a class that inherits all the methods and properties from another class.,Now we have successfully added the __init__() function, and kept the inheritance of the parent class, and we are ready to add functionality in the __init__() function.,In the example below, the year 2019 should be a variable, and passed into the Student class when creating student objects. To do so, add another parameter in the __init__() function:
class: