1. An introduction to Python
A series of introductory lessons to Python that does not use too much maths!

2. Let us write a four line poem
Write a poem
Let us write a four line poem

3. Challenge 1
print("Mashed potatoes on the ceiling.") print("Green beans on the floor.") print("Stewed tomatoes in the corner.") print("Squash upon the door.")

4. Change a vegetable
We are now going to change the program so that we can alter the name of one of the vegetables
To do this we need to:
Add a variable
Make sure that it appears in a line

5. Challenge 2
veg="Carrots“ print("Mashed "+veg+" on the ceiling.") print("Green beans on the floor.") print("Stewed tomatoes in the corner.") print("Squash upon the door.")

6. Challenge 3
Can you change the program so that the variable appears in every line?
# for example print("Green“+veg+"on the floor.")
print(veg+"on the door.")

7. Challenge 3
veg="Carrots" print("Mashed "+veg+" on the ceiling.") print("Green "+veg+" on the floor.") print("Stewed "+veg+" in the corner.") print(veg+" upon the door.")

8. Make the computer input
We are now going to change the program so that the computer accepts an input from the keyboard

9. Challenge 4
veg=input("Type in the name of a vegetable ") print("Mashed "+veg+" on the ceiling.") print("Green "+veg+" on the floor.") print("Stewed "+veg+" in the corner.") print(veg+" upon the door.")

10. Have four different vegetable
Instead of having just one input can you change the program so that it has four – one for each line.

11. Challenge 5
Change here print("Mashed“+ Change here+ " on the ceiling.") print("Green“+ Change here+" on the floor.") print("Stewed“+ Change here+" in the corner.") print(Change here+" upon the door.")
# for example veg1=input ("What is vegetable 1? ")
veg2=input("What is vegetable 2? ")………….
# for example
print("Mashed "+veg1+" on the floor") print("Green "+veg2+"on the floor.")

12. Challenge 5
veg1=input("What is vegetable 1? ") veg2=input("What is vegetable 2? ") veg3=input("What is vegetable 3? ") veg4=input("What is vegetable 4? ") print("Mashed"+veg1+ "on the ceiling.") print("Green"+veg2+" on the floor.") print("Stewed"+veg3+" in the corner.") print(veg4+" upon the door.")

13. Random vegetable
Now lets change the program so that random vegetables are displayed
To do this we need to:
Import the commands for the random library
Create a list with vegetable names
Choose a vegetable

14. First part of the program
# To use random numbers import random veglist=[“Beans", “Brocolli", “Cabbage", “Cauliflower"] veg=random.choice(veglist)

15. Challenge 6
#to use random numbers import random veglist=["Beans","Broccoli","Cabbage"] veg=random.choice(veglist) print("Mashed "+veg+ "on the ceiling.") print("Green "+veg+" on the floor.") print("Stewed "+veg+" in the corner.") print(veg+" upon the door.")

16. Challenge 7
Create a program that randomly chooses a member of your class
Create a new list with names of you class
Randomly choose a name
Print the chosen name
Challenge 8
Create a program to roll a six sided dice

17. Challenge 9
Unfortunately our program does not look too good at the moment. We can make it look a lot better by using a library of commands called easygui The gui stands for Graphical User Interface

18. GUI Poem #load the easygui commands from easygui import * title="Poem“
veg=enterbox("Type the name of a vegetable ")
message=("Our poem is about a "+veg)
msgbox(message, title)
message=("Mashed "+veg+" on the ceiling")
Enter the program as shown on the right.
What do you think will happen?
Run it and see

19. Challenge 10
Can you add the other lines of the poem?

20. Challenge 11 Like to guess what these lines do?
msg ="Choose a vegetable?"
choices = ["Pea", "Parsnip", "Aubergine", "Tomato"]
veg = buttonbox(msg, title, choices)

21. Challenge 11
Add the lines to your program and see if they work
Challenge 12
What does changing buttonbox for choice box have?

22. Let’s create a quiz program
Challenge 13
Let’s create a quiz program

23. Challenge 13
correct = 0 print("Here is a quiz to test your knowledge of television") print() print("Question 1") print("What type of animal is Shaun?") print("a. Cow") print("b. Dog") print("c. Sheep") correct = "c" answer = input("Make your choice: ") if answer == correct: print("Right Answer!") else: print("Wrong Answer! “)

24. Challenge 13
correct = 0 print("Here is a quiz to test your knowledge of television") print() print("Question 1") print("What type of animal is Shaun?") print("a. Cow") print("b. Dog") print("c. Sheep") correct = "c" answer = input("Make your choice: ") if answer == correct: print("Right Answer") else: print("Wrong Answer! ")
Try to think of a reason for the two equal signs
It is called a logic test

25. Can you add two more questions?
Challenge 14
Can you add two more questions?

26. Challenge 15 We would like to add a score to the quiz
To do this we need to:
create a variable – score
If correct we will add one to the score
We will also print the score

27. Challenge 15
Add score = 0 as the first line of the program Within the if commands (you have to do this for all 3 questions if answer == correct: print("Right Answer") score=score+1 else: print("Wrong Answer! ") print("The score is "+str(score)+" out of 3")

28. Challenge 15
correct=0 score = 0 print("Here is a quiz to test your knowledge of television") print() print("Question 1") print("What type of animal is Shaun") print("a. Cow") print("b. Dog") print("c. Sheep") correct = "c" answer = input("Make your choice: ") if answer == correct: print("Right Answer!") score = score+1 else: print("Wrong Answer!") print("The score is "+str(score)+" out of 3")

29. Challenge 16
Can you use the easygui commands (challenge 9-12) to make the quiz easier to use?

30. Challenge 17
We are now going to make another type of quiz One which tests multiplication tables Run the code on the next slide and check that the program works Can you explain what each line does?

31. Challenge 17
#import random library import random number1=random.randint(1,12) number2=random.randint(1,12) print("What is "+str(number1)+ " x "+str(number2)+" ?"); answer=input() #change the answer into a number answer=int(answer) if answer == (number1*number2): print("Correct") else: print("Wrong")

32. Challenge 18
This only does one question We would like more than that so we will use a loop The loop surrounds the program like this: question = 1 while question<6: program question=question+1 Everything that you want to happen in the loop must be indented (moved in) 3 spaces

33. Challenge 18
#import random library import random question= 1 while question<6: number1=random.randint(1,12) number2=random.randint(1,12) print("What is "+str(number1)+" x "+str(number2)+ “ ?"); answer=input() #change the answer into a number answer=int(answer) if answer == (number1*number2): print("Correct") else: print("Wrong") question=question+1

34. Challenge 19
Can you change the program to ask 10 questions?
Challenge 20
Can you change the program so that is keeps a score and is easier to use (use easygui)?