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copied!<p>in normal python you can't do what you want. there are two close approximations:</p> <pre><code>def myfunction(first, second, *args): # args is a tuple of extra arguments def myfunction(first, second, third=None): # third is optional </code></pre> <p>however, if you <em>really</em> want to do this, you can certainly make it work (at the risk of offending the traditionalists ;o). in short, you would write a <code>wrapper(*args)</code> function that checks the number of arguments and delegates as appropriate. this kind of "hack" is usually done via decorators. in this case you could achieve something like:</p> <pre><code>from typing import overload @overload def myfunction(first): .... @myfunction.overload def myfunction(first, second): .... @myfunction.overload def myfunction(first, second, third): .... </code></pre> <p>and you'd implement this by making the <code>overload(first_fn)</code> <em>function</em> (or constructor) return a callable object where the <code>__call__(*args)</code> <em>method</em> does the delegation explained above and the <code>overload(another_fn)</code> <em>method</em> adds extra functions that can be delegated to.</p> <p>you can see an example of something similar here <a href="http://acooke.org/pytyp/pytyp.spec.dispatch.html" rel="noreferrer">http://acooke.org/pytyp/pytyp.spec.dispatch.html</a> but that is overloading methods by type. it's a very similar approach...</p> <p>UPDATE: and something similar (using argument types) is being added to python 3 - <a href="http://www.python.org/dev/peps/pep-0443/" rel="noreferrer">http://www.python.org/dev/peps/pep-0443/</a></p>

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