Python for Absolute Beginners Transcripts
Chapter: Organizing and reusing code with functions
Lecture: Adding a computer opponent
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0:00
Well this is pretty fun
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and when we run it, we have to ask for the two people
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and then we have to enter the two roles that they play.
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Well, what I would like to do is have that
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always be the computer
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and the computer automatically just play
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not taking into account what I've typed
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but what the options are.
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So that's what we're going to do in this section here
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and it's super easy.
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We're going to need to have the computer
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make some kind of random selections.
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So we already saw the random library, that had randint.
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We're going to use the random library again.
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We'll import random.
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Remember, pretty much enough to type r
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and that's it.
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Right now Pycharm has it gray
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and what that means is you're importing this library
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but you're not actually using it.
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It's unnecessary, your code would work just fine
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if you were to take it away.
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If I hit Enter, it'll just clean those up
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cause it's like, hey this is unused.
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But that's just because we're about to use it.
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So, for player name two, instead of asking
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let's just say this is the computer.
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And then, we could even simplify this
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and make this just you, for now.
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Here we ask: Hey you, what is your role?
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And then, we're going to get something.
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And down here we're going to go
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instead of asking the player for an input
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we're not even going to need to validate it
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cause it's always going to be valid.
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What we're going to do is, we're going to use that random library.
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Now, there's ways in which we could use a random integer
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and the length of the roles and all that
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but Python has a much better option.
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We can just say random, and we don't have to type all of it
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Pycharm will help us there.
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If we have a list like this, of multiple items
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and we want to randomly get one of them
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all we have to do is say choice.
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And, we can come over here and just say choice
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and give it.
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As I say it take a sequence, well let's give it rolls.
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Perfect.
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So, we do this, it'll say: You roll
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Make it like this
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You roll that and the computer rolls this.
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All right, let's give this a shot.
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Will we have it working?
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Notice also I've maximized this just a bit more
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just for more room here.
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Okay, you want to do your roll.
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Maybe we want to ask for your name again.
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We will later.
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I want to play paper.
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You roll paper, computer rolls scissors, game over!
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Computer takes the game, cool.
2:01
Can you see how incredibly easy that was
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to have a computer opponent random?
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Random choice and just set the name, that's it.
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That was it.
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Now we have a computer opponent.
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It's kind of crazy
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Of course, it's not very smart, it's just random
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but you know.
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There it goes.
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The idea though, is that this function
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choice that take data and returns data
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allowed us to work in an incredibly simple way.
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I'm sure the actual details of choice
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is not too complicated
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it can't be as complicated as the random number thing
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but maybe actually use that deep down inside.
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So, here we have a computer opponent
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by just using this function.
