[Tkinter] Thousand Separator Entry Widget Cursor Pos Trouble

[papatubies]

how to fix cursor pos?

def atPos(atX=0,atY=0):
   frame = Frame(root)
   frame.place(x=atX,y=atY)
   return frame

class MyEntry:
   def __init__(self,parent):
       self.frame = Frame(parent, width=150,height=24)
       self.frame.pack_propagate(False)
       self.frame.pack()
       self.var = StringVar()
       self.var.trace("w", self.thousandseparator)
       self.vcmd = (self.frame.register(self.onValidate),'%d', '%P', '%S')
       self.entry = Entry(self.frame,textvariable=self.var, validate="all", validatecommand=self.vcmd)
       self.entry.pack(fill=BOTH,expand=True)

   def onValidate(self, d, P, S):
       if d=='1':
           if S in '0123456789':
               return True
           else:
               return False
       else:
           return True

   def thousandseparator(self,*arg):
       self.pra = self.var.get()
       self.buff = self.pra.replace(',','')
       if len(self.buff) > 0:
           self.value = int(self.buff)
           self.change = "{:,}".format(self.value)
           self.var.set(self.change)

if __name__ == '__main__':
   import locale
   from tkinter import *

   root = Tk()
   root.geometry('325x120+50+50')

   pos10 = atPos(15,10)
   label1 = Label(pos10,text='Type Number Only').pack()
   pos11 = atPos(150, 10)
   entry = MyEntry(pos11)

   pos20 = atPos(15,37)
   label2 = Label(pos20,text='Type Number again').pack()
   pos21 = atPos(150, 37)
   entry = MyEntry(pos21)

   pos3 = atPos(150,80)
   Exit = Button(pos3,text=' Exit ',command=lambda : quit()).pack()

   root.mainloop()