btnTotal = Button(RightMidFrame, font=('arial',12,'bold'), text ="Total", bd =6, width=15, command = Product)
btnTotal(row=10,column=0)
lblExit = Button(RightMidFrame, font=('arial',12,'bold'), text ="Exit", bd = 6, width=15, command = iExit)
lblExit.grid(row=10,column=1) lblReset = Button(RightMidFrame, font=('arial',12,'bold'), text ="Reset", bd = 6, width=15, command = Reset)
lblReset.grid(row=10,column=2)
以下是错误：
btnTotal(row=10,column=0)
TypeError: 'Button' object is not callable