Python Magic 8 Ball
Creating a “Magic 8 ball game using Python
In this introduction to programming using Python, students will create a “Magic 8-Ball” game. The game will work by asking the user to input a yes / no style question and will respond with one of it’s classic predictions such as: “Yes”, “Most likely” and “Outlook not so good”.
Suggested time: 60 mins
Learning Objectives:
Curriculum Mapping:
KS2:
KS3:
In this introduction to programming using Python, students will create a “Magic 8-Ball” game. The game will work by asking the user to input a yes / no style question and will respond with one of it’s classic predictions such as: “Yes”, “Most likely” and “Outlook not so good”.
Suggested time: 60 mins
Learning Objectives:
- Understand and use sequence in an algorithm
- Understand and use selection in an algorithm (IF, Else and Else if)
- Understand and data structures in an algorithm (for example, Lists, Tables or Arrays)
- Understand the importance of comments in code
Curriculum Mapping:
KS2:
- Design, write and debug programs that accomplish specific goals; solve problems by breaking them into smaller parts. Select, use and combine a variety of software on a range of digital devices to design and create a range of programs.
- Use sequence, selection and repetition in programs; work with variables and various forms of input and output
- Use logical reasoning to explain how some simple algorithms work; detect and correct errors in algorithms and programs
KS3:
- Use two or more programming languages, at least one of which is textual, to solve a variety of computational problems.
- Make appropriate use of data structures [for example, lists, tables or arrays]; design and develop modular programs that use procedures or functions
Introduction:
The Magic 8-ball is a fortune telling toy created by Mattel in the 1950s.
The Magic 8-ball is a fortune telling toy created by Mattel in the 1950s.
Image by CRASH:Candy, used under a Creative Commons Attribution 2.0 Generic license (Flickr image link)
The concept is simple. Ask the 8-ball a yes or no question and the 8-ball will reply with answers such as “Yes”, “No”, “Without a doubt” etc. (Seemingly being able to predict the future)
The Magic 8 Ball is made up of 20 responses – 10 positive, 5 negative and 5 neutral. The 20 answers are:
Positive answers:
● It is certain ● It is decidedly so ● Without a doubt ● Yes definitely ● You may rely on it ● As I see it, yes ● Most likely ● Outlook good ● Yes ● Signs point to yes
Negative answers:
● Don't count on it ● My reply is no ● My sources say no ● Outlook not so good ● Very doubtful
Neutral answers:
● Reply hazy try again ● Ask again later ● Better not tell you now ● Cannot predict now ● Concentrate and ask again
According to Wikipedia: (http://en.wikipedia.org/wiki/Magic_8-Ball) “Using the coupon collector's problem in probability theory, it can be shown that it takes, on average, 72 outcomes of the Magic 8 Ball for all 20 of its answers to appear at least once.”
To find out more about the Magic 8-Ball game, click on the links below:
The Magic 8 Ball is made up of 20 responses – 10 positive, 5 negative and 5 neutral. The 20 answers are:
Positive answers:
● It is certain ● It is decidedly so ● Without a doubt ● Yes definitely ● You may rely on it ● As I see it, yes ● Most likely ● Outlook good ● Yes ● Signs point to yes
Negative answers:
● Don't count on it ● My reply is no ● My sources say no ● Outlook not so good ● Very doubtful
Neutral answers:
● Reply hazy try again ● Ask again later ● Better not tell you now ● Cannot predict now ● Concentrate and ask again
According to Wikipedia: (http://en.wikipedia.org/wiki/Magic_8-Ball) “Using the coupon collector's problem in probability theory, it can be shown that it takes, on average, 72 outcomes of the Magic 8 Ball for all 20 of its answers to appear at least once.”
To find out more about the Magic 8-Ball game, click on the links below:
- Wikipedia (Magic 8-Ball) - http://en.wikipedia.org/wiki/Magic_8-Ball
- Magic 8-Ball.org - http://www.magic8ball.org
Lesson Outline:
In this introduction to programming using Python, students will create a “Magic 8-Ball” game. The game will work by asking the user to input a yes / no style question and will respond with one of it’s classic predictions such as: “Yes”, “Most likely” and “Outlook not so good”.
Starter:
Direct students to one of the online Magic 8-Ball games listed below. Instruct students to ask the Magic 8-Ball a series of yes / no questions and note down some of the answers. Ask students to note down any repeat answers.
Note: Use these sites at your own risk. TeachwithICT.weebly.com is not responsible for the content of external Internet sites.
Online Magic 8-Ball games:
Ask the Magic 8 Ball – http://eightball.tridelphia.net
The Magic 8-Ball - http://lord.xopl.com/ulpage3a/8-ball.html
Interactive Magic 8-Ball - http://www.magicmgmt.com/gary/magic8ball/index1.html
After a few minutes, stop the class and ask them to feedback their findings to the rest of the class.
Note down some of the students’ findings and ask the students how they think the game works. Try to draw out answers such as “answers are randomly generated” and “answers chosen from a list”.
Finally, inform students that they are going to create a Magic 8-Ball game that will appear to predict the future.
STEP 1: Introducing the Random Function
Before students create their Magic 8-ball game, they need to become familiar with the random function in Python.
Tell students that they are going to write an algorithm to simulate the flipping of a coin.
Instruct students to type in and run the following code:
In this introduction to programming using Python, students will create a “Magic 8-Ball” game. The game will work by asking the user to input a yes / no style question and will respond with one of it’s classic predictions such as: “Yes”, “Most likely” and “Outlook not so good”.
Starter:
Direct students to one of the online Magic 8-Ball games listed below. Instruct students to ask the Magic 8-Ball a series of yes / no questions and note down some of the answers. Ask students to note down any repeat answers.
Note: Use these sites at your own risk. TeachwithICT.weebly.com is not responsible for the content of external Internet sites.
Online Magic 8-Ball games:
Ask the Magic 8 Ball – http://eightball.tridelphia.net
The Magic 8-Ball - http://lord.xopl.com/ulpage3a/8-ball.html
Interactive Magic 8-Ball - http://www.magicmgmt.com/gary/magic8ball/index1.html
After a few minutes, stop the class and ask them to feedback their findings to the rest of the class.
Note down some of the students’ findings and ask the students how they think the game works. Try to draw out answers such as “answers are randomly generated” and “answers chosen from a list”.
Finally, inform students that they are going to create a Magic 8-Ball game that will appear to predict the future.
STEP 1: Introducing the Random Function
Before students create their Magic 8-ball game, they need to become familiar with the random function in Python.
Tell students that they are going to write an algorithm to simulate the flipping of a coin.
Instruct students to type in and run the following code:
|
import random
cointoss = [“Heads”,”Tails”] print(random.choice(cointoss)) |
Explain to students that the first line imports the random function needed for the 'coin toss' game to work. Explain that the second line creates a list containing our two possible outcomes from flipping a coin and that the last line selects a random entry from the list (in this case either “Yes” or “No”) and display it on the screen.
Ask students to comment the code, using the hashtag (#), explaining what the code is doing. Explain that these two lines of code will form the main basis of their ‘Magic 8-ball’ game.
Extension:
STEP 2 – Creating a simple Magic 8-Ball game
Before the students start writing the code for their game, they must first import the necessary libraries to make the code work. Tell students that will first need to import the following libraries:
Ask students to comment the code, using the hashtag (#), explaining what the code is doing. Explain that these two lines of code will form the main basis of their ‘Magic 8-ball’ game.
Extension:
- Challenge students to modify their code to simulate the rolling of a dice.
STEP 2 – Creating a simple Magic 8-Ball game
Before the students start writing the code for their game, they must first import the necessary libraries to make the code work. Tell students that will first need to import the following libraries:
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import random
import time |
When creating their Magic 8-Ball game, students will first need to create a list containing all of the 8-ball's possible responses. I suggest starting with just 3 responses: "Yes". "No" and "Maybe".
Instruct students to create a list containing some responses. For example:
Instruct students to create a list containing some responses. For example:
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responses = ["yes","no","maybe"]
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Next, ask students to instruct the user to input a 'Yes/No answer' type question:
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question = input("Please ask me a Yes/No style question ")
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Next, tell students that they are going to add in a pause (using the time.sleep() function) to make it look as if the computer is thinking about the answer:
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time.sleep(2)
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Finally, ask students to write the code to select a response at random from the list:
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print(random.choice(responses))
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The finished solution will look something like this:
Extension:
Challenge students to:
Challenge students to:
- Comment their code explaining how it works.
- Input all of the 20 classic answers. (See above) Hint: Students can change the answers if they wish however, they must keep to the format of 10 positive, 5 negative and 5 neutral answers.
- Modify the code so that the pause is random.
- Modify their code so that the game repeats (loops) until the user tells it to stop.
Resources:
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Example solution
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Extension - File handling
Having really long lists in Python is not very efficient. Not only that, it makes it more difficult to debug. A much better way to handle the list of responses would be to use a text file.
Ask students to create a text file containing all the 20 possible responses (each on a new line) and save this as 'responses.txt' e.g.
Having really long lists in Python is not very efficient. Not only that, it makes it more difficult to debug. A much better way to handle the list of responses would be to use a text file.
Ask students to create a text file containing all the 20 possible responses (each on a new line) and save this as 'responses.txt' e.g.
|
It is certain
It is decidedly so Without a doubt Yes definitely You may rely on it As I see it, yes Most likely Outlook good Yes Signs point to yes |
Finally, instruct students to copy the following code (making sure that they read the comments explaining what the code is doing).
|
import random
import time # Open the 8 Ball responses text file f = open('responses.txt','r') # Read the whole file and store each line in a list responses = f.readlines() # Ask the user to input a Yes/No style question question = input("Please ask me a question") # Pause for 2 seconds to make it look like the computer is thinking time.sleep(2) # Print a response at random from the list print(random.choice(responses)) |
Plenary:
Direct students to swap places with a partner or person next to them and try out their Magic 8-Ball game. Instruct the students to place a comment in their partner’s code suggesting at least one improvement. After a few minutes, ask the students to return to their seats and make any suggested improvements.
Licence:
Unless otherwise specified, everything in this repository is covered by the following licence:
Direct students to swap places with a partner or person next to them and try out their Magic 8-Ball game. Instruct the students to place a comment in their partner’s code suggesting at least one improvement. After a few minutes, ask the students to return to their seats and make any suggested improvements.
Licence:
Unless otherwise specified, everything in this repository is covered by the following licence:
Python 'Magic 8-Ball' lesson is licenced under a Creative Commons Attribution 4.0 International License.
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