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    <p>What you've asked for can't be done (nicely -- there are ways of doing it but they are nasty hacks). BUT: you don't really want to do that. Think at a higher level: you want an easy way to modify a function to log that it has started. Changing the <em>source code</em> of the function isn't a good way do to that -- after all, the logging has nothing to do with what the function is doing! Instead, you want to modify the function <em>ex post facto</em>.</p> <pre><code>def startLog( func ): def loggedFunc( *args, **kwargs ): print( "starting {0} with {1}".format( func.__name__, args[ 0 ] ) ) return func( *args, **kwargs ) return loggedFunc @startLog def theFunc( ): print( "running theFunc" ) theFunc( ) # starting theFunc # running theFunc </code></pre> <p>This is an example of a Python <em>decorator</em>: it transforms a function at define-time into another one. It's syntactic sugar for:</p> <pre><code>def theFunc( ): print( "running theFunc" ) theFunc = startLog( theFunc ) </code></pre> <p>In other words, you are taking the function object itself (remember -- functions are objects too, you can pass them around, modify them, look at their attributes, etc!) and redefining it. Looking at the source code, we see that <code>startLog</code> defines a new function (<code>loggedFunc</code>), which first prints a log trace and then runs the original function, passing through its arguments. Applying the decorator replaces <code>theFunc</code> with <code>loggedFunc</code>, so that the function bound to the name <code>theFunc</code> now logs itself!</p> <p>Does that make sense? I'm happy to explain it in more detail.</p> <h3>Edit</h3> <p>As has been pointed out, this doesn't specifically answer your question; if you need any more functionality than this then use the <code>logging</code> module which does everything you'll ever need and then some. Walking the stack is just icky, as well as fragile, though =p.</p>
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    1. POHow do I get the same functionality as C's __FUNCTION__ in Python?
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    1. USKatriel
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    1. COThanks. I am going to have to do some reading and testing to understand your answer. I'll be back.
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      1. UScodebunny
    2. COThis doesn't answer the question; he wants to be able to make logs anywhere he needs to in a function and have the function name included automatically, not just log when he enters a function.
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      1. USGlenn Maynard
    3. COHe didn't say that! If that is needed then yes, this doesn't answer the question, but then inspecting the stack is never the right way to do it.
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