Prelab

3. Class B extends class A. Class B defines an _str_ method that returns the string representation of its instance variables. Class B defines a single instance variable named age, which is an integer. Write the code to define the _str_ method for class B. This method should return the combined string information from both classes. Label the data for age with the string "Age: ".

class A:
    def __init__(self):
        self.message = "This is from Class A\n"
    
    def __str__(self):
        return self.message


class B(A):
    def __init__(self):
        super().__init__()
        self.age = 18

    def __str__(self):
        return super().__str__() + "Age: " + str(self.age)

b  = B()
print(b)

Inlab

4. The ATM program allows a user an indefinite number of attempts to log in. Fix the program so that it displays a popup message that the police will be called after a user has had three successive failures. The program should also disable the login button when this happens.

# Other codes soon.

Laboratory Report: Click here to download