Retrieval of widget property values

[Jah_Alarm]

hi, here's my problem:

let's say I have a function that uses some widget's property. How canI
retireve the value of this property?

For example,

PopSize=IntVar();

popsize=Entry(root,width=10,textvariable=PopSize)

def rand_opo_gen (self,event):
      popsize_start=#need to get the textvariable value from Entry
popsize, not variable PopSize!
      pop1=random.random(popsize_start*2)

Another option, of course, is that the variable PopSize acquires the
value from Entry, but I can't see how to do it either

cheers,

alex