# Tk_delete_objects.py

# Tk_delete_objects.py

from Tkinter import *
import random
root = Tk()

h = 360
w = 540

objs = []
colors='red orange yellow green cyan blue purple goldenrod khaki grey black'.split()
c=colors[:]
def removeobjs():
    if len(objs) > 0:
        canvas.delete(objs.pop())

def randomobjs():
    w2 = (random.randrange(100))
    h2 = (random.randrange(250))+10
    w3 = (random.randrange(200))+180
    h3 = (random.randrange(250))+10
    if not c: [c.append(z) for z in colors]
    objs.append(canvas.create_line(w2, h2, w3, h3, width=20, fill=c.pop()))


canvas = Canvas(root)
canvas.pack()
frame = Frame(root, bg='grey', width=w, height=h)
frame.pack(fill='x')

button1 = Button(frame, text='Add', command=randomobjs)
button1.pack(side='left', padx=10)
button2 = Button(frame, text='Remove', command=removeobjs)
button2.pack(side='left')

root.mainloop()