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2013-03-24T16:58:54.413
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<p>To answer your questions:</p> <h3><code>main()</code> function</h3> <p>Nothing is special about it. You have to call it yourself, by doing something like:</p> <pre><code>def main(): print "This is main" if __name__ == "__main__": main() </code></pre> <h3>Why use <code>main()</code></h3> <p>The reason you might do that is to keep your main entry-point code together in a convenient way. For instance, if you create some variables in <code>main()</code>, they won't be global variables, which avoids polluting the global namespace. It also prevents the <code>main()</code> function from being run if you import the module from another (instead of running it directly as a script). This can be useful if you don't want to do some initialization (e.g., print messages) when importing, but you do want to do them when running as a standalone script.</p> <h3>How does Python decide which function to call</h3> <p>Python does not support "overloading" in this sense. There can only be one function with a given name in a given namespace. If you make a second function with the same name (or second method with the same name in the same class), you overwrite the first one completely.</p> <h3><code>__init__.py</code></h3> <p>This question is not really related to your others. But no, it doesn't process them in a different way. It processes them at a different time (when you import a package, rather than a module in a package), but the code in them is run just the same as the code in any other Python file.</p>
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1. POUnderstanding "def main" and "overloading" in Python
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1. COso the main really is a function like any other ?
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2. CO@pictr: Yes, just like any other.
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