Thank you , Massimo.

Would please write down the statement for calculating the count of Things 
for every person?

 instead of 

>>> for row in persons_and_things.select():
        print row.person.name, row.thing.name
Alex Boat
Alex Chair
Bob Shoes
Curt Boat


I would like to get


Alex 2
Bob 1
Curt 1


Regards,

Ashraf

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