rolling a pair of dice python

I need to write a python program that simulates the rolling of two six-sided dice for 1000 times, and stores each trial output and the sum in a table.

For example:

               trial no: 1, trial: (3,4), sum: 7

               trial no: 2, trial: (5,4), sum: 9 

 

and so on for 1000 times. and then i need to calculate the mean of the sum.