[PDO-Users]passing params

Hi,
I'm a newbie and just started using the PDO module.  In the Doc's if my 
connection.paramstlye = 'pyformat' then
I pass params as '...WHERE name=%(name)s'  but does not appear  to work.  

mysono='11532'

myRS=db.open("select * from sosord where csono='%s'"% mysono) 
the above works.... but

myRS=db.open('select * from sosord where csono=%(mysono)s')
the above does not work

This is what should be passed
myRS=db.open("select * from sosord where csono='11532'")

So could someone explain what is happening
Thanks john


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