Carsten Haese carsten at uniqsys.com
Mon Dec 4 17:36:20 EST 2006

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On Mon, 2006-12-04 at 14:03 -0800, king kikapu wrote:
> I recap: if i put only functions declarations on a .py file, like
> these:
> def A(): print "a"
> def B(): print "b"
> def C(): print "c"
> 
> and run the program, nothing happens, nothing executed.

Nothing *visible* happens. The "def" statements *do* get executed.
Executing the statement

def A(): print "a"

does the following, roughly, modulo irrelevant implementation details:

* The function body gets compiled into byte code (but not executed).
* A callable object with the byte code for the compiled function body is
constructed.
* The thusly constructed callable object is bound to the name A in your
current namespace.

So, a lot of stuff happens when the interpreter executes a def
statement, but that stuff is not visible to you.

Hope this helps,

Carsten.

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