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So that touches on lists, now to assign a name. Now, if we instantiate a new character object, we get the following initial state: Functions and Conditionals We can then apply this logic to our character class for all of our values derived from lists: We can use this together with the len() function (which returns the number of elements in an array) to get a random list index to get a random value, for example when I run the following code: When executed, the function will return a random number inclusive of both parameters. This method takes two int parameters, start and end. This module contains several pseudo-random number generators however we’re mainly interested in randint(). Simple! Now we have access to the random module throughout our code. The simplest way to do this is to use the Python ‘random’ module, so let’s add the following line to the top of our code: Since we are looking to randomise this process, we need a way to pseudo-randomly generate some list indexes. Okay, so that was simple enough to set up, time to start defining some of our object properties.
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When we run the code and inspect the object in memory, we can confirm this by viewing its state right after we instantiate it. This can take some getting used to, but your IDE should help you out a bit! Something you might have noticed is that Python doesn’t use curly brackets to distinguish code blocks, rather it uses whitespace to make the distinctions in code scope. This is responsible for setting the default values of your object properties, in this case all just empty strings for now. The def _init_ is the default constructor called when you initialise a new instance of the character class. Next, we need some sort of object to collate all our character information, Python is an object-oriented programming language (OOP), and it provides us simple syntax to define a class and initialise it as an object: it is possible to change their content like so: We can get elements out of lists directly by using an index
I’ve kept the number of races & classes we’re including to 3 each just to keep the name variations and the amount of repetitive coding down for this exercise. Let’s set some up to capture some of the name data we need to get started. To declare a list of strings in Python it’s simple syntax:
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Otherwise, we might end up with a dwarf character with human name like Steve, I think Lord of the Rings would have been a very different movie if Tolkien used a random generator to create his characters! Lists, classes and objects You might think to start with a name, but since we’re going to be randomising our character each time we run the program, it’s more logical to start with a random character to base our generation from. OK, that’s enough boring planning – let’s get coding! First things first
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You can download the latest version of Python 3 here.
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Traditionally it involves pens, paper, dice and snacks, today we’re going to recreate that in software (well maybe not the snacks).Īnd I’ve been meaning to learn Python 3 for some time, so here we go: Planning and set-up
I’m going to assume you’ve at least heard of the most popular table-top roleplaying game in the world before, or at least you might have seen the kids in Stranger Things play it. You can see my previous C# implementation here and my pure JavaScript implementation here. Writing methods and working with parameters.I know you didn’t think I could be any cooler right? Well, in my defence it’s a domain I know well and just writing a small amount of code to create a basic character generally covers the following programming fundamentals: The project involves the generation of a randomised dungeons & dragons (D&D) player character. When learning a new programming language, I have a project I like to recreate to learn the basics.
I have no excuse not to learn it and see what the fuss is all about! How I like to learn This is crazy, as in my opinion, Python is only behind JavaScript in terms of the most used language in the world. The last time I briefly used it, Python 3 had just been released and was being ignored by almost everyone due to all to breaking changes people had porting over to it from Python 2. I have a bit of a confession to make, I’ve never really bothered to learn Python.