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POImplementation of functions with very basic scripting
 

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    <p>I've been playing around with python for some time and decided to better my generalized understanding of programming languages by writing a custom script handler in python. I have so far successfully implemented a basic memory handler and hooked a memory address ordinate to printing to the screen. My question can be posed as:</p> <p>How can functions be implemented here? A goto statement is too easy, I would like to try something more difficult. (edit) Eventually i want to be able to do:</p> <pre><code>f0(x, y, z):=ax^by^cz </code></pre> <p>...in a shell that runs a script that runs this module (silly, eh?)</p> <pre><code># notes: separate addresses from data lest the loop of doom cometh class Interpreter: def __init__(self): self.memory = { } self.dictionary = {"mov" : self.mov, "put" : self.put, "add" : self.add, "sub" : self.sub, "clr" : self.clr, "cpy" : self.cpy, "ref" : self.ref } self.hooks = {self.val("0") : self.out } def interpret(self, line): x = line.split(" ") vals = tuple(self.val(y) for y in x[1:]) dereferenced = [] keys_only = tuple(key for key in self.memory) for val in vals: while val in self.memory: val = self.memory[val] dereferenced.append(val) vals = tuple(y for y in dereferenced) self.dictionary[x[0]](vals) def val(self, x): return tuple(int(y) for y in str(x).split(".")) def mov(self, value): self.ptr = value[0] def put(self, value): self.memory[self.ptr] = value[0] def clr(self, value): if self.ptr in self.hooks and self.ptr in self.memory: x = self.hooks[self.ptr] y = self.memory[self.ptr] for z in y: x(z) del self.memory[self.ptr] def add(self, values): self.put(self.mat(values, lambda x, y: x + y)) def sub(self, values): self.put(self.mat(values, lambda x, y: x - y)) def mat(self, values, op): a, b = self.memory[values[0]], self.memory[values[1]] if len(a) &gt; len(b): a, b = b, a c = [op(a[x], b[x]) for x in xrange(len(b))] + [x for x in a[len(a):]] return [tuple(x for x in c)] def cpy(self, value): self.put(value) def out(self, x): print chr(x), def ref(self, x): self.put(x) interp = Interpreter() for x in file(__file__.split('/')[-1].split(".")[-2] + ".why"): interp.interpret(x.strip()) </code></pre> <p>a sample script:</p> <pre><code>mov 1 put 104.101.108.108.111.10 mov 0 ref 1 clr 0 </code></pre> <p>(EDIT) I've made the decision to use this attempt as inspiration and start from scratch on this project. (Hopefully I'll find some real time to sit down and code before classes start up again.) <strike>I intend to award the best answer in a few days</strike>. I hope that that information fails to dissuade potential contributors from submitting anything they feel to be helpful for this sort of coding problem.</p>
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    1. COI think you need to be more specific that just "basic input/output functions", but basically it looks like you could do whatever it is the same way you've done everything else...i.e. add one or more commands to your interpreter.
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    2. COI replaced that question with a better (more specific) one.
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    3. CO@Sean Pedersen It will be easier to answer if you show how it should behave (some real-action tests, passed or failed).
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