[mod_python] the req object

On Wed, Jun 13, 2007 at 04:15:38PM -0400, Jim Gallacher wrote:
> Hi David,
> 
> David Bear wrote:
> >When is the req object made available?
> >
> Think of the handler method as the entry point into your code for each 
> request.
> 
> Consider the simplest possible handler as an example:
> 
> AddHandler mod_python .py
> PythonHandler helloworld
> 
> 
> helloworld.py
> -------------
> 
> from mod_python import apache
> 
> MSG = 'Hello world'
> my_sum = 10 + 10
> 
> def handler(req):
>     req.content_type = 'text/plain'
>     req.write(MSG)
>     return apache.OK
> 
> Note that the statement my_sum = 10 + 10 is only executed once, not 
> every time a new request arrives. Same for MSG and our initial import 
> statement.

OK. Great. So, my_sum = 10 + 10 is executed when apache loads and
reads helloworld.py the first time -- and upon any subsequent module
reloads? This makes sense to me.. is it correct?

What if helloworld.py imported another module named goodbye.py that
had this:

goodbye.py
-----------

newvar = 10 + 10

def coolfunc(somestring):
   backwards = somestring.split()
   backwards.reverse()
   return(backwards)

If I understand, when helloworld is imported, any imports it does will
also be executed -- and then any expressions in the imported modules
will ALSO be evaluated when they are imported. So, newvar will be
evaluated when helloworld is imported by apache -- but coolfunc won't
do anything untill it is called presumably by helloword.py.

Am I approaching correctness here?

> 
> 
> 

-- 
David Bear
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fax: 	602-496-0955
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