[tryton-dev] Not able to set value to the selection type of field

[sunny14486]

Hi All,

I have two selection fields A and B. Then on change of A i want to set my 
own value to the B.

But it hasn't been set.  I am able to set for other type of 
fields(Char,Text etc.).

Is it possible in tryton for selection fields to set value?

Thanks
--sunny