f = '1.0/sin(2.0 * x)'
# f = input()

root = Tk()

canv = Canvas(root, width = 1000, height = 1000, bg = "white")
canv.create_line(500,1000,500,0,width=2,arrow=LAST)
canv.create_line(0,500,1000,500,width=2,arrow=LAST)

First_x = -500

for i in range(16000):
    if (i % 800 == 0):
        k = First_x + (1 / 16) * i
        canv.create_line(k + 500, -3 + 500, k + 500, 3 + 500, width = 0.5, fill = 'black')
        canv.create_text(k + 515, -10 + 500, text = str(k), fill="purple", font=("Helvectica", "10"))
        if (k != 0):
            canv.create_line(-3 + 500, k + 500, 3 + 500, k + 500, width = 0.5, fill = 'black')
            canv.create_text(20 + 500, k + 500, text = str(k), fill="purple", font=("Helvectica", "10"))
    try:
        x = First_x + (1 / 16) * i
        new_f = f.replace('x', str(x))
        y = -eval(new_f) + 500
        print(new_f)
        x += 500
        canv.create_oval(x, y, x + 1, y + 1, fill = 'black')
    except:
        pass
canv.pack()
root.mainl