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To: python-list@python.org
From: "Gabriel Genellina" <gagsl-py2@yahoo.com.ar>
Subject: Re: Hotshoting recursive function
Date: Wed, 25 May 2011 05:50:44 -0300
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Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:6211

En Sun, 22 May 2011 10:42:08 -0300, Selvam <s.selvamsiva@gmail.com>  
escribió:

> I am using  hotshot module to profile my python function.
>
> I used the details from (
> http://code.activestate.com/recipes/576656-quick-python-profiling-with-hotshot/
> ).
>
> The function I profile is a recursive one and I am getting the following
> error,
>
> "ProfilerError: profiler already active"
>
> I guess this is due to the recursive call to the profiling function.
>
> I would like to get some suggestions.

The recursive call inside your function should call the undecorated  
function, not the decorated function again. Decorator syntax is not  
convenient anymore.

Using the same names as in the recipe example:


# a recursive function
def my_slow_function(n):
   ...
   return my_slow_function(n-1)


my_profiled_slow_function = hotshotit(my_slow_function)
my_profiled_slow_function(n)


This works, in the sense that it does not raise ProfileError anymore.  
Interpreting profile data is up to you...


-- 
Gabriel Genellina