I did read the contents of the link http://wiki.forum.nokia.com/index.php/How_to_use_logs about how to use the logs.
My problem is that i do not get any output from the logs.sms(mode='out') method, though my SMS "Sent" folder has 20 messgages. the count of 20 i got it too through the inbox module.
To make the story short this is what I wrote:
for i in range(len(l)):
#please fix the code for me the following or the above line.
# i want also to know whether I am accessing the logs correctly
#I am getting an empty string here from the print(). I DO want the phone number of the recipient. I am calculating the bills.