# Import tkinterfromtkinterimport*classLoanCalculator:def__init__(self):window=Tk()# Create a windowwindow.title("Loan Calculator")# Set title# create the input boxes.Label(window,text="Annual Interest Rate").grid(row=1,column=1,sticky=W)Label(window,text="Number of Years").grid(row=2,column=1,sticky=W)Label(window,text="Loan Amount").grid(row=3,column=1,sticky=W)Label(window,text="Monthly Payment").grid(row=4,column=1,sticky=W)Label(window,text="Total Payment").grid(row=5,column=1,sticky=W)# for taking inputsself.annualInterestRateVar=StringVar()Entry(window,textvariable=self.annualInterestRateVar,justify=RIGHT).grid(row=1,column=2)self.numberOfYearsVar=StringVar()Entry(window,textvariable=self.numberOfYearsVar,justify=RIGHT).grid(row=2,column=2)self.loanAmountVar=StringVar()Entry(window,textvariable=self.loanAmountVar,justify=RIGHT).grid(row=3,column=2)self.monthlyPaymentVar=StringVar()lblMonthlyPayment=Label(window,textvariable=self.monthlyPaymentVar).grid(row=4,column=2,sticky=E)self.totalPaymentVar=StringVar()lblTotalPayment=Label(window,textvariable=self.totalPaymentVar).grid(row=5,column=2,sticky=E)# create the buttonbtComputePayment=Button(window,text="Compute Payment",command=self.computePayment).grid(row=6,column=2,sticky=E)window.mainloop()# Create an event loop# compute the total payment.defcomputePayment(self):monthlyPayment=self.getMonthlyPayment(float(self.loanAmountVar.get()),float(self.annualInterestRateVar.get())/1200,int(self.numberOfYearsVar.get()))self.monthlyPaymentVar.set(format(monthlyPayment,'10.2f'))totalPayment=float(self.monthlyPaymentVar.get())*12 \*int(self.numberOfYearsVar.get())self.totalPaymentVar.set(format(totalPayment,'10.2f'))defgetMonthlyPayment(self,loanAmount,monthlyInterestRate,numberOfYears):# compute the monthly payment.monthlyPayment=loanAmount*monthlyInterestRate/(1-1/(1+monthlyInterestRate)**(numberOfYears*12))returnmonthlyPayment;root=Tk()# create the widget# call the class to run the program.LoanCalculator()