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POHow can I get the values of the locals of a function after it has been executed?
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copied!<p>Suppose I have a function like <code>f(a, b, c=None)</code>. The aim is to call the function like <code>f(*args, **kwargs)</code>, and then construct a new set of args and kwargs such that:</p> <ol> <li>If the function had default values, I should be able to acquire their values. For example, if I call it like <code>f(1, 2)</code>, I should be able to get the tuple <code>(1, 2, None)</code> and/or the dictionary <code>{'c': None}</code>.</li> <li>If the value of any of the arguments was modified inside the function, get the new value. For example, if I call it like <code>f(1, 100000, 3)</code> and the function does <code>if b > 500: b = 5</code> modifying the local variable, I should be able to get the the tuple <code>(1, 5, 3)</code>.</li> </ol> <p>The aim here is to create a a decorator that finishes the job of a function. The original function acts as a preamble setting up the data for the actual execution, and the decorator finishes the job.</p> <p>Edit: I'm adding an example of what I'm trying to do. It's a module for making proxies for other classes.</p> <p><pre><code> class Spam(object): """A fictional class that we'll make a proxy for""" def eggs(self, start, stop, step): """A fictional method""" return range(start, stop, step)</p> <p>class ProxyForSpam(clsproxy.Proxy): proxy_for = Spam @clsproxy.signature_preamble def eggs(self, start, stop, step=1): start = max(0, start) stop = min(100, stop)</p> <p></pre></code></p> <p>And then, we'll have that:</p> <p><code>ProxyForSpam().eggs(-10, 200) -> Spam().eggs(0, 100, 1)</code></p> <p><code>ProxyForSpam().eggs(3, 4) -> Spam().eggs(3, 4, 1)</code></p>

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