# Tk_basic_paint_demo.py

# Tk_basic_paint_demo.py

from Tkinter import *

canvas_width=500
canvas_height=400
px=py=None

def oRGB(rgb): # pass
    r,g,b = rgb
    return "#%02x%02x%02x" % (r,g,b)

def paint(event):
    global px,py
    x,y=event.x, event.y
    w.create_line((x, y, px, py), width=3, fill=oRGB([255,128,0]))
    px,py=x,y

def mouse_btn_down(event):
    global px,py
    px,py=event.x, event.y

master=Tk()
master.title("Tk Basic Paint Demo")
w = Canvas(master,
           width=canvas_width,
           height=canvas_height)
w.pack(expand=YES, fill=BOTH)
w.bind("<B1-Motion>", paint)
w.bind('<1>', mouse_btn_down)