Построить параметрический график (Tkinter)

import Tkinter
 
def print_graf():
    A=entryA.get()
    B=entryB.get()
    C=entryC.get()
    X1=entryX1.get()
    X2=entryX2.get()
    y=[]
    x=[]
    text['height']=int(X2)-int(X1)
    text.update()
    text.insert(Tkinter.END, 'x - y\n')
    for i in range(int(X1),int(X2)):
        x.append(i)
        y.append(i/float((int(A)*i**2+int(B)*i+int(C))))
        
    for i in range(len(x)):
        text.insert(Tkinter.END, str(x[i])+' - '+str(y[i])+'\n')
    for i in range(int(X2)-int(X1)):
        canvas.create_line(x[i]*100,y[i]*100,x[i+1]*100,y[i+1]*100)
    text.insert(Tkinter.END, str(x[len(x)+1])+' - '+str(y[len(y)+1])+'\n')    
    canvas.update()
 
 
 
window=Tkinter.Tk()
 
 
labelA=Tkinter.Label(window, text='Enter A')
labelA.pack()
entryA=Tkinter.Entry(window)
entryA.pack()
labelB=Tkinter.Label(window, text='Enter B')
labelB.pack()
entryB=Tkinter.Entry(window)
entryB.pack()
labelC=Tkinter.Label(window, text='Enter C')
labelC.pack()
entryC=Tkinter.Entry(window)
entryC.pack()
labelX1=Tkinter.Label(window, text='Enter X1')
labelX1.pack()
entryX1=Tkinter.Entry(window)
entryX1.pack()
labelX2=Tkinter.Label(window, text='Enter X2')
labelX2.pack()
entryX2=Tkinter.Entry(window)
entryX2.pack()
labelX2=Tkinter.Label(window, text='Resultats\n')
labelX2.pack()
text=Tkinter.Text(window, height=1, font='14')
text.pack()
 
canvas=Tkinter.Canvas(window, border=1)
 
canvas.pack()
 
 
 
button=Tkinter.Button(window,text='Print',command=print_graf)
button.pack()
 
 
window.mainloop()