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copied!<p>Remember, in Python, <em>everything is an object and we really mean that</em>. Functions are objects too. We can store functions in a dictionary, and in fact that's exactly what you seem to want to do here.</p> <pre><code>turn_lf = lt(step_size ) </code></pre> <p>The key problem here is that you want to store "a function that calls <code>lt</code> with <code>step_size</code> as the argument", but here you have just called <code>lt</code> with <code>step_size</code> as an argument immediately, and stored the return value.</p> <p>Arguably the simplest way to get what you want is to use <code>functools.partial</code> to "bind" the <code>step_size</code> argument.</p> <pre><code>from functools import partial turn_lf = partial(lt, step_size) # `lt` is not called yet. # Now, later on, we can do turn_lf() # and it's just as if we did `lt(step_size)`. # So now we can store `turn_lf` in a dict, look it up and call it later, etc. # Similarly for all the other functions you want to make. </code></pre> <p>(Another problem is that you haven't been consistent with this; if you want everything to go in one dict, then you need to indicate the bindings for the <code>color</code> function as well. <code>'brown'</code> is just a string, after all. Fortunately, this is just as simple as with the other functions: we just make our <code>partial(color, 'brown')</code>.</p> <p>As for <code>"z" : delete</code>, well - we don't have any arguments to bind to <code>undo</code>. So while we <em>could</em> follow the pattern and write <code>partial(undo)</code> (notice, no more arguments, because we aren't binding anything), it makes much more sense to just write <code>undo</code> directly.</p> <p>As an aside, we can simplify this:</p> <pre><code>for key in key_action: pressed_key = key activated_key = key_action[key] </code></pre> <p>To this:</p> <pre><code>for pressed_key, activated_key in key_action.items(): </code></pre>

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