Create a graphical user interface that is suitable for use with the program you

Question

 Create a graphical user interface that is suitable for use with the program you wrote for below program.  Your interface should reflect both the information you need to prompt for and what the output would look like based on your answer to below program.  #!/usr/bin/python  import math  class PI:    pi=0     def calculate_pi(self,n):        sum=0        for j in range(0,n):            sum = sum + (math.pow(-1,j)/((2*j)+1)) #summation of the Leibniz series            pi = 4 * sum        return float(pi) #return number     def use_pi(self,r,pi): #shows usage of pi attribute in class        radius=r        area=pi*radius*radius #calculates Circle area        return float(area)  #print the output obj=PI() n = input('Enter number of values to be used in the pi calculation : ') p=obj.calculate_pi(int(n)) print (" pi = ", p) rad = input(' Enter radius of Circle : ') print (" Area of Circle = ", obj.use_pi(int(rad),p)) 

Explanation / Answer

I've used Tkinter package for GUI.

import math
import Tkinter

main = Tkinter.Tk() #Creating main window.
class PI:
   pi=0

   def calculate_pi(self,n):
       sum=0
       for j in range(0,n):
           sum = sum + (math.pow(-1,j)/((2*j)+1)) #summation of the Leibniz series
           pi = 4 * sum
       return float(pi) #return number

   def use_pi(self,r,pi): #shows usage of pi attribute in class
       radius=r
       area=pi*radius*radius #calculates Circle area
       return float(area)

p = 0.0
obj=PI()

def reading_radius():
    global p
    rad = entry2.get()#Getting text from entry box.
    entry2.delete(0, 'end')#Clearing entry box.
    area_display = ' Area of Circle = ' + str(obj.use_pi(int(rad),p))
    #Displaying result in a label.
    label4 = Tkinter.Label(main, text = area_display, font = ('Candara', 12, 'bold'))
    label4.pack()

def reading_input():
    global p
    n = entry1.get()
    entry1.delete(0, 'end')
    p=obj.calculate_pi(int(n))
    pi_display = ' PI = ' + str(p)
    label2 = Tkinter.Label(main, text = pi_display, font = ('Candara', 12, 'bold'))
    label2.pack()

#Adding components to main window.
label1 = Tkinter.Label(main, text = 'Enter number of values to be used in the pi calculation :', font = ('Candara', 12, 'bold'))
label1.pack()#Using pack() method to place component to window.
entry1 = Tkinter.Entry(main, font = ('Candara', 11), width = 40, justify = 'right')
entry1.pack()
#Adding submit button for reading first input.
submit1 = Tkinter.Button(main, font = ('Candara', 12, 'bold'), text = 'Submit', command = reading_input)
submit1.pack()

label3 = Tkinter.Label(main, text = 'Enter radius of circle :', font = ('Candara', 12, 'bold'))
label3.pack()
entry2 = Tkinter.Entry(main, font = ('Candara', 11), width = 40, justify = 'right')
entry2.pack()
submit2 = Tkinter.Button(main, font = ('Candara', 12, 'bold'), text = 'Submit', command = reading_radius)
submit2.pack()

#Running GUI Application in mainloop().
main.mainloop()

Screenshots:

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