Part 4¶
In part 4 we’ll add images for the quiz questions and show them one at a time.
This part is very rough and includes chat sessions from our Coder Dojo session. I’ll fix these soon so that it is easier to follow.
Whose baby is this?¶
Look in draw function, do you see the line that says if state == ‘play’:
So under the answer images put this line:
screen.draw.text("Whose baby is this?", (25, HEIGHT/2), color='white', fontsize=40)
But… What about the indenting? What do we line it up with? Try it and see what happens. Work together with your mentor to fix any problems.
OK, so now we need to show the question, the right image for the next question.
There are a few lines to add…
Under your baby_animals list at the top, add this line:
questions = list(enumerate(question_images))
This turns your list of images into a list of question numbers and images, so 1, frog; 2, newt, etc.
Next, under Whose baby is this? add these lines to show the first image from the question list:
n,q = questions[0]
screen.blit(q, (25, HEIGHT/2 + 50))
Now we have to let the player answer each question…
Answer the question¶
Do you see where we spot the SPACE key? What function is it in?
on_key_up
Yes. OK a few lines to add now…
What we are doing is watching for the player’s key presses.
They can press the number keys to answer each question
So first line to add at the end of that function is…
if state == 'play' and keys.K_0 <= key <= keys.K_9:
What do you think this does: keys.K_0 <= key <= keys.K_9
Here’s a similar bit of code, what would this do:
a = 5
if 1 < a < 10:
print("Hello!")
(This is a simpler version)
If a is between 1 and 10 then print hello.
OK, so back to our code
That line checks to see if the key pressed is between 1 and 9
Now add these lines under the if-statement (I’ve repeated the if-statement again):
if state == 'play' and keys.K_0 <= key <= keys.K_9:
n,q = questions[0]
answer = key.value - keys.K_0.value - 1
Great. So here’s where we are:
If the player presses a number key, we get the next question number in n.
We work out what answer they’ve given and store it in answer
We now need to test if they got the answer correct.
Add this code next:
if answer == n:
print("Correct!")
questions.pop(0)
else:
print("Wrong, try again")
questions.pop(0) removes the first question in the list so that
next time around we show the next question.
Now time to test the quiz! Check in the console as you answer each question.
Add more animals¶
Now might be a good time to add more animals.
- Try dragonfly: their babies are really cool!
- Or caddisfly: their babies make little stone shelters to live in.
After your search you should end up with pairs of images: the answer one (the adult) and the question one (the baby). Put these into the two arrays you have at the top of your code:
answer_images = ['newt.jpg', 'frog.jpg', ]
question_images = ['baby_newt.jpg', 'tadpoles.jpg', ]
If you now press Play those new animals should appear in your quiz.
