Python - Updated

Year 7 - Lesson 1 
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Slide 1: Tekstslide
ComputingLower Secondary (Key Stage 3)

In deze les zitten 45 slides, met interactieve quizzen, tekstslides en 4 videos.

time-iconLesduur is: 50 min

Onderdelen in deze les

Year 7 - Lesson 1 

Slide 1 - Tekstslide

To program a computer using the python programming language

Slide 2 - Tekstslide

Slide 3 - Video

We will be using the PRIMM approach when we learn to code


Slide 4 - Tekstslide

Task 1 - PREDICT
What do you think this code will do?

Slide 5 - Tekstslide

What will the code do?

Slide 6 - Open vraag

Slide 7 - Tekstslide

Using the code you have try and:
  • make it say a different message
  • Make the message print 3 times by calling the procedure multiple times

Slide 8 - Tekstslide

Create your own program that will:

Slide 9 - Tekstslide

Slide 10 - Video

What is Syntax?
  • The way we write a line of code is important, as the computer needs to recognise it.
  • Think about our 'English'. It is important that we use correct punctuation, such as Commas and Full Stops. If we didn't, it would make our writing difficult to read.
  • If we do not use the correct symbols and spellings in our Python coding, then the computer will not be-able to run our programs.

Slide 11 - Tekstslide

What is debugging?
  • Debugging code refers to the process of identifying and fixing errors, bugs, or defects in a computer program that we have created.

  • An error occurs, when you have done something wrong in your program. You could have spelt something wrong or even missed out a symbol...

Slide 12 - Tekstslide

Debugging Continued...
Create with code, shows you where your error is. Below is a screenshot that shows this.

Slide 13 - Tekstslide

Task 2 - Debugging
In this task, you will need to debug the code using the error messages that create with code provide.

Click here

Slide 14 - Tekstslide

Slide 15 - Video

  • In programming, a variable is like a container that holds a piece of information. This information can be anything, like a number, a word, or even a whole sentence!

  • For example, imagine you have a box that can hold a piece of fruit. You can put an apple in the box, and then later on, you can take the apple out and look at it or even swap it for a banana. In programming, a variable is like that box. You can put information into the variable, and then you can use that information later on in your program and change it as you please.

  • To use a variable, you first need to give it a name. This is like labelling the box with the word "fruitbox" so you know what's inside. In programming, you can choose any name you want for your variable, as long as it follows certain rules. For example, the name can't have spaces in it, and it can't start with a number.

Slide 16 - Tekstslide

Task 3 - Variables - Predict

Slide 17 - Tekstslide

What do you think the code will do?

Slide 18 - Open vraag

Slide 19 - Tekstslide

Using the code try the following:
  • make the program call the other two procedures
  • Change the name in the printing2 procedure to your name
  • (Harder) Add more text after the greeting in printing3 so it will print the following --> "Hello Sally , nice to meet you"

Slide 20 - Tekstslide

Taking input
We can ask the user for inputs into our programs.
So lets get the computer to do this

Slide 21 - Tekstslide


Slide 22 - Tekstslide

What do you think this code will do when run?

Slide 23 - Open vraag

Slide 24 - Tekstslide

Try and do the following:
  • change the procedure name for printmyname() to printname()
  • add two more input questions to the askmestuff() procedure about a favourite hobby and place in the world and store them in suitable variables
  • add another print statement to the same procedure to print suitable text using the new stored variables.

Slide 25 - Tekstslide

Create your own program that:
  • has a procedure that asks 2 questions and stores them as variables
  • calls this procedure from the main code
  • results in a sentence being printed, using the stored variables
  • Here is a blank coding window

Slide 26 - Tekstslide

Syntax errors?
Let's test some of those error checking skills
On the next drag and drop which bits of code are correct and which would cause an error?

Slide 27 - Tekstslide

print = ("Hello")
print("this one)
name = imput("what is your name")
name = input("what is your name")
print("this text")
fav colour = "Green"
age = 10
print("Hello", name)

Slide 28 - Sleepvraag

Commenting our code. What is the importance?
  • By commenting our code,  it tells you (the programmer) and anyone else who looks at the code what it does.

  • By using the '#' symbol, it will not display when your code has been run.

  • You have been seeing them since we started but you have to start using them to help you explain what you are doing

Slide 29 - Tekstslide

What symbol do I use to comment code?

Slide 30 - Open vraag

What is the process of checking a program for errors by running it and fixing the issues?
Error checking
Error finding
Mistake finding

Slide 31 - Quizvraag

What type of information can be stored in a variable?
Only videos
Only sounds
Only pictures
Numbers, text, and other types of data

Slide 32 - Quizvraag

Adding conditions
We have been taking inputs, storing variables and outputting results to the screen
Now we need to add some conditions.

Slide 33 - Tekstslide


Slide 34 - Tekstslide

What do you think this code would do?

Slide 35 - Open vraag

Slide 36 - Tekstslide

Slide 37 - Video

Investigate and Modify
Change the code here to do the following:
  • Change the condition to check if the name is equal to "Bob"
  • if it is "Bob" then say "Hey there Bob! I know you!"
  • else then print out "Have you seen Bob anywhere?"

Slide 38 - Tekstslide

Make a program that
  • Has a procedure called checkfood():
  • Ask the user to enter their favourite food and store it as a suitable variable
  • Check if their favourite food is "pizza" or not
  • If it is then print something positive about it
  • If it isn't then say something negative about it
  • Call the procedure you made in the main code routine
  • Here is a blank to code in

Slide 39 - Tekstslide

If this, if that
  • Sometimes we need to check for more than one thing
  • And we need to check for certain things in a certain order
  • This is where "elif" comes in 
  • it stands for ELSE IF
  • you only check the elif when the first if has failed
  • you can then add as many of these as you like
  • and they get checked in order until one if met
  • if none are met then the code under the ELSE part will run

Slide 40 - Tekstslide


Slide 41 - Tekstslide

Slide 42 - Tekstslide

Investigate and Modify
With this code try and:
  • Edit the names and responses the code is looking for in the various statements
  • add an additional elif statement to look for an additional name

Slide 43 - Tekstslide

Make your own version of an if/elif/else statement which:
  • Has a procedure defined appropriately
  • asks the user to enter a favourite animal
  • checks the animal against 4 different animals, each with a specific response if they are selected
  • prints that it doesn't like the animal if it is not one of these 4
  • calls the written procedure in the main code routine
  • You can use this blank

Slide 44 - Tekstslide

Slide 45 - Tekstslide