Session One (1.5.1) Modules and Hex

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Objectives

By the end of this session, you should be able to:

create a program in Python;
debug Python code.

Engage

We’ve already been splitting our programs into bits called subroutines – created using the def command. When programs get too big we sometimes want to go even further. In this module you will be splitting your program into whole separate files – modules. We normally call the main module main…

Think about the other programs you’ve created. Are there any which could naturally be split into two or more “parts” with related subroutines together?

Unfortunately, you need to do something a bit different with this program. You will see Hex introduced on page 30 of your book, but this version will only run on Python locally on your computer, not in TLJH. Instead look at the code from pages 54–58 for an alternative version.

Learn

Enabling access

Create a Jupyter Notebook file and save it with an appropriate name.

You will see a cell – type in the “first cell” code from page 54 and then hit the run button (like a play button – a triangle).

This won’t do anything, but it also should not cause any problems or throw any errors – you are just giving Python access to the routines it needs to be able to use.

Learn

Code for a Hexagon

Create a new cell and copy out the “second cell” code from pages 54–56 (70 lines).

When you hit run, it again won’t do anything but equally it shouldn’t give any errors!

This is creating the code for a Hexagon, teaching it how to draw itself and change its own colour, amongst other things.

Learn

Code for the HexGame

Create a new cell and copy out the “third cell” code from pages 56–58 (107 lines).

When you hit run, it once again won’t do anything but equally it still shouldn’t give any errors!

This is creating the code for the HexGame – telling it to create some Hexagons, arrange them in a grid, let you click them and figure out if you’ve won or not.