Starting Out with Python (4th Edition)
4th Edition
ISBN: 9780134444321
Author: Tony Gaddis
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 11.2, Problem 5CP
Look at the following class definitions:
class Vegetable:
def _ _init_ _(self, vegtype):
self._ _vegtype = vegtype
def message(self):
print("I'm a vegetable.")
class Potato(Vegetable):
def_ _init_ _(self):
Vegetable._ _init_ _(self, 'potato')
def message(self):
print("I'm a potato.")
Given these class definitions, what will the following statements display?
v = Vegetable('veggie')
p = Potato()
v.message()
p.message ()
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Create a class called ship that incorporates a ship’s serial number and location. Create another class angle which has two variables latitude and longitude. A member function of the ship class should get a position from the user and store it. Create object that should report the serial number and position. Write a main () program that creates three ships, asks the user to input the position of each, and then displays each ship’s serial number and position.Identify all the classes implement inheritance between them.
(language cpp)
Q2. Write a class Bank that has the following data members
–Account Holder name (ah_name[])
–Account number (ac_number)
•Must unique, system generates automatically, and must starting from 100 (Hints: Use another static variable and assign that variable to ac_number)
–Balance in the account (ac_balance)
•The class has the following member functions
–A constructor to initialize the data members
–Input() to takes name from the user
–Deposit(parameter) to deposits balance in the account
•Must accept parameter (The amount to deposit)
–Withdraw(parameter) to withdraws balance after checking
•Must accept parameter (The amount to withdraw)
–Display() to show the name, account number, and balance
Parent Class: Food
Write a parent class called Food. A food is described by a name, the number of grams of sugar (as a whole number), and the number of grams of sodium (as a whole number).
Core Class Components
For the Food class, write:
the complete class header
the instance data variables
a constructor that sets the instance data variables based on parameters
getters and setters; use validity checking on the parameters where appropriate
a toString method that returns a text representation of a Food object that includes all three characteristics of the food
Class-Specific Method
Write a method that calculates what percent of the daily recommended amount of sugar is contained in a food. The daily recommended amount might change, so the method takes in the daily allowance and then calculates the percentage.
For example, let's say a food had 6 grams of sugar. If the daily allowance was 24 grams, the percent would be 0.25. For that same food, if the daily allowance was 36 grams, the…
Chapter 11 Solutions
Starting Out with Python (4th Edition)
Ch. 11.1 - In this section, we discussed superclasses and...Ch. 11.1 - Prob. 2CPCh. 11.1 - What does a subclass inherit from its superclass?Ch. 11.1 - Look at the following code, which is the first...Ch. 11.2 - Look at the following class definitions: class...Ch. 11 - In an inheritance relationship, the ___________ is...Ch. 11 - In an inheritance relationship, the _________ is...Ch. 11 - Suppose a program uses two classes: Airplane and...Ch. 11 - This characteristic of object-oriented programming...Ch. 11 - Prob. 5MC
Ch. 11 - Polymorphism allows you to write methods in a...Ch. 11 - It is not possible to call a superclasss _ _init_...Ch. 11 - A subclass can have a method with the same name as...Ch. 11 - Only the _ _init_ _method can be overridden.Ch. 11 - You cannot use the isinstance function to...Ch. 11 - What does a subclass inherit from its superclass?Ch. 11 - Look at the following class definition. What is...Ch. 11 - Prob. 3SACh. 11 - Write the first line of the definition for a...Ch. 11 - Look at the following class definitions: class...Ch. 11 - Look at the following class definition: class...Ch. 11 - Employee and ProductionWorker Classes Write an...Ch. 11 - ShiftSupervisor Class In a particular factory, a...Ch. 11 - Person and Customer Classes The Person and...
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
Is the following program legal (assuming appropriate #include and using directives are added)? void showEmploye...
Problem Solving with C++ (9th Edition)
Finish the program that takes a word as a command-line argument and looks up the word to see whether it is in t...
Programming in C
Consider a program that will keep track of the items in a schools library. Draw a class hierarchy, including a ...
Java: An Introduction to Problem Solving and Programming (7th Edition)
For each of the following E-R diagrams from Chapter 2 C: Transform the diagram to a relational schema that show...
Modern Database Management (12th Edition)
What is denormalization?
Database Concepts (7th Edition)
Suppose the registers 0x4 and 0x5 in the Vole contain the bit patterns 0x3A and 0xC8, respectively. What bit pa...
Computer Science: An Overview (13th Edition) (What's New in Computer Science)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- (Java) The Sculpture Subclass Write class as follows: The class is named Sculpture, and it inherits from the Painting class. It has a private boolean member variable named humanForm It has a default constructor that assigns the values "No name" to name, "No artist" to artist, -1 to the year, "No medium" to the medium, and false to the humanForm variable. This default constructor calls the five argument constructor. It has a five-argument constructor to assign values to the name, artist, year, medium, and humanForm variables. It has a getter and setter for the humanForm variable. It has a toString() method. This class contains no other methods Make sure to include your name, the name of this class, our course number, and the Activity number in a Javadoc comment at the top. Make sure to write a Javadoc comment for each of these methods.arrow_forwardEmployee and ProductionWorker Classes Create an Employee class that has properties for the following data: Employee name Employee number Next, create a class named ProductionWorker that is derived from the Employee class. The ProductionWorker class should have properties to hold the following data: Shift number (an integer, such as 1, 2, or 3) Hourly pay rate The workday is divided into two shifts: day and night. The Shift property will hold an integer value representing the shift that the employee works. The day shift is shift 1 and the night shift is shift 2. Create an application that creates an object of the ProductionWorker class and lets the user enter data for each of the object’s properties. Retrieve the object’s properties and display their values.arrow_forwardBank Account Class Part (1) Define a class with the following specification:(a) The class name is BankAccount and it has two private variables: fullName (String) and balance (double). (b) Write a constructor that initializes fullName and balance variables. If balance is negative, then set it to 0.0 and print the message “Invalid balance. Balance is set to 0.0”. (c) Provide a set and get methods to balance variable. In set method, if the supplied balance (parameter) is negative print an invalid message and do not change the balance.(d) Write a method deposit() that has one double input parameter called amount. The method adds amount to the current balance.(e) Write a method withdraw() that has one double input parameter called amount. The method subtracts amount from the current balance.(f) Write method printInfo() that displays the full name on a single line followed by the balance on the next line. Part (2) Write a Java application to test the class you defined in Part (1):(a) Ask…arrow_forward
- JAVA PROGRAMMING: Lesson – Overloading Constructors Create a class named House that includes data fields for the number of occupants and the annual income as well as methods named setOccupants(), setIncome(), getOccupants() and getIncome() that set and return those values respectively. Additionally, create a constructor that requires no arguments and automatically sets the occupants field to 1 and income field to 0. Create an additional overloaded constructor . This constructor receives an integer argument and assigns the value to the occupants field. Create a third overloaded constructor this time, the constructor receives 2 arguments, the values of which are assigned to the occupants and income fields respectively. Create another class named I_house that instantiates the House class and see if the constructors work correctly.arrow_forwardinventory.py templete #========The beginning of the class ========== classShoe: def__init__(self,country,code,product,cost,quantity): pass ''' In this function, you must initialise the following attributes: ● country, ● code, ● product, ● cost, and ● quantity. ''' defget_cost(self): pass ''' Add the code to return the cost of the shoe in this method. '''defget_quantity(self):pass''' Add the code to return the quantity of the shoes. ''' def__str__(self): pass ''' Add a code to returns a string representation of a class. ''' #=============Shoe list==========='''The list will be used to store a list of objects of shoes.''' shoe_list=[] #==========Functions outside the class============== defread_shoes_data(): pass ''' This function will open the file inventory.txt and read the data from this file, then create a shoes object with this data and append this object into the shoes list. One line in this file represents data to create one object of shoes. You must use the try-except in this…arrow_forwardInheritance and UML (Java) Design a class named Employee. The class keeps the following information in fields: - Employee Name - Employee Number in the format XXX-L, where each X is a digit within the range 0-9 and the L is a letter within the range A-M. - Hire Date - Shift (an integer) - Hourly pay rate (a double) Write one or more constructors and the appropriate accessor and mutator methods for the class. The workday is divided into two shifts: day and night. The shift field will be an integer value representing the shift that the employee works. The day shift is shift1 and the night shift is shift 2. a) Draw a UML diagram of the class. Be sure to include notation showing each field and method’s access specification and data type. Also include notation showing any method parameters and their data types. b) Write a program that demonstrates the class.arrow_forward
- Java A class always has a constructor that does not take any parameters even if there are other constructors in the class that take parameters. Choose one of the options:TrueFalsearrow_forwardNewspaperSubscriber class- create an abstract class named NewspaperSubscriber with attributes to contain the subscriber’s street address and the subscription rate. Include get and set methods for both these attributes. The set method for the rate is abstract. The setAddress method must prompt the user to enter the subscriber’s address through the use of a dialog box. Create a constructor for the base class. Create a toString() method that concaternates and returns the subscriber’s street address and rate for display. Create 3 child classes named SevenDaySubscriber, Weekday Subscriber, and Weekend Subscriber. Each child class has an additional attribute called subType, which is a String, that will store the type of newspaper subscription. Create a setType method that will set the type of subscriber as follows: “Seven Day”, “Weekday”, or“Weekend”. Create a setRate method for each child class that sets the rate as follows: a SevenDaysubscriber pays R18.00 per week for his newspapers, a…arrow_forwardCreate an Employee class that has properties for the following data: • Employee name • Employee number Next, create a class named ProductionWorker that is derived from the Employee class. The ProductionWorker class should have properties to hold the following data: • Shift number (an integer, such as 1, 2, or 3) • Hourly pay rate The workday is divided into two shifts: day and night. The Shift property will hold an integer value representing the shift that the employee works. The day shift is shift 1 and the night shift is shift 2. Create an application that creates an object of the ProductionWorker class and lets the user enter data for each of the object’s properties. Retrieve the object’s properties and display their values.arrow_forward
- Look at the following description of a problem domain: The bank offers the following types of accounts to its customers: savings accounts, checking accounts, and money market accounts. Customers are allowed to deposit money into an account (thereby increasing its balance), withdraw money from an account (thereby decreasing its balance), and earn interest on the account. Each account has an interest rate.Assume that you are writing a program that will calculate the amount of interest earned for a bank account.a. Identify the potential classes in this problem domain.b. Refine the list to include only the necessary class or classes for this problem.c. Identify the responsibilities of the class or classes.arrow_forwardLook at the following partial class definition, and then respond to the questions that follow it: public class Student { private String Name; private String ID; private String Email; } a. Write a constructor for this class. The constructor should accept an argument for each of the fields. b. Write a ‘sendEmail” method, that takes one argument of character type called Grade. This method should print output to screen as below replacing the variable with actual values: Dear ‘Name’, You have received grade ‘Grade’. This email is being sent to your email address at “Email”arrow_forwardTimer Class Concepts tested: Classes 1) Write a class called Timer that models a stopwatch with start, stop, and reset buttons. It has the following members: a) -int startTime; // variable tracking when the timer was started (unused when timer is not running). In number of seconds since 1970 b) -int timeOnClock; // variable tracking the time on the clock since last reset in seconds c) -bool isRunning; //variable tracking wether the clock is running or stopped d) +Timer(); //constructor, initializes all to zero/false e) +Timer(bool startNow); // constructur that starts clock automatically if startNow is true f) +int getTime(); // returns time on clock in seconds. If clock is running, this must also include the time since it was last started g) +void addTimeToClock(int seconds); // allows manually adding time to the clock h) +void reset(); // resets time on clock to zero i) +void start(); // starts clock j) +void stop(); // stops clock k)…arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
EBK JAVA PROGRAMMINGComputer ScienceISBN:9781337671385Author:FARRELLPublisher:CENGAGE LEARNING - CONSIGNMENT
Programming Logic & Design ComprehensiveComputer ScienceISBN:9781337669405Author:FARRELLPublisher:Cengage
EBK JAVA PROGRAMMING
Computer Science
ISBN:9781337671385
Author:FARRELL
Publisher:CENGAGE LEARNING - CONSIGNMENT
Programming Logic & Design Comprehensive
Computer Science
ISBN:9781337669405
Author:FARRELL
Publisher:Cengage
Introduction to Classes and Objects - Part 1 (Data Structures & Algorithms #3); Author: CS Dojo;https://www.youtube.com/watch?v=8yjkWGRlUmY;License: Standard YouTube License, CC-BY