How Fitmeal replies to text messages with nutrition facts (edited snippet)

reply.py

def reply(request):
    """
    Reply to a text message with nutrition facts (edited snippet)
    """

    args = {}
    if request.method == 'POST':

        # Get the text message
        text = request.POST.get('text')

        # Find the food
        features = app_process.extract_features(text)
        
        # Find the nutrition facts
        nutrients = app_process.compute_nutrients(features)
        
        # Write the response
        response = app_process.compose_response(nutrients)

        if response:
            args.update({'response': response})
        else:
            logger.error(text)

    return render_to_response('reply.xml', args, context_instance=RequestContext(request), content_type='application/xml')