[mod_python] Mod_python Charts

On 14/10/2005, at 10:13 PM, <python_it at hotmail.com> wrote:

> Did somebody has experience with CharDirector and Mod_python  
> (Publisher).
> (Python 2.4 / ChartDirector for Python / Modpython 3.2.2b)
> I can’t make chart with this combination? (I don’t get errors?)
> Publisher is working ok with other scripts.
>
> I use the following script files:
>
> Index.htm => index.py => chart.tmpl
>
> Index.htm
> =================
> Link to index.py
>
>
> Index.py
> =================
> from mod_python import psp,util
>
> def index(req, perc=[10 , 10 , 80], descrip=['10', '10' ,'80'],  
> title="chart", filename="chart.png"):
>     req.content_type = ‘text/html’
>     tmpl = psp.PSP(req, filename='templates/chart.tmpl', vars= 
> {'req': req, 'psp': psp, 'perc': perc, 'descrip': descrip, 'title':  
> title, 'filename': filename})
>     tmpl.run()

For the filename argument you are using a relative pathname. This will
not work as Apache often runs with cwd as '/' or some other directory.
It will not be the directory the script file is in and changing cwd  
should
not be done. Instead use:

   import os
   __here__ = os.path.dirname(__file__)

   from mod_python import psp,util

   def index(req, perc=[10 , 10 , 80], descrip=['10', '10' ,'80'],  
title="chart", filename="chart.png"):
       req.content_type = ‘text/html’
       filename = os.path.join(__here__,'templates/chart.tmpl')
       tmpl = psp.PSP(req, filename=filename vars={'req': req, 'psp':  
psp, 'perc': perc,'descrip': descrip, 'title': title, 'filename':  
filename})
       tmpl.run()