RGB显示-python-tk

学了一下午的tk编程，写了个目前自己需要的东西，RGB显示，
学习Tk的目的是因为简单，跨平台。

from Tkinter import *

def drawrgb():
    
    r=sboxr.get()
    g=sboxg.get()
    b=sboxb.get()
    
    rr=int(r, 10)
    gg=int(g, 10)
    bb=int(b, 10)
    rgb=rr*256*256+gg*256+bb
    srgb=hex(rgb)
    srgb=srgb.replace('0x','')
    srgb=srgb.zfill(6)
    srgb='#' + srgb
    
    print hex(rr),hex(gg), hex(bb),'-----',srgb
    canvas1.create_rectangle(0, 0, 300, 100, fill=srgb)
    
if __name__ == "__main__":
    root = Tk()
    root.geometry('300x250+50+100')

        
    
    labelr = Label(root,text='Red:').pack()
    sboxr = Spinbox(root,from_=0, to=255,command=drawrgb)
    sboxr.pack()

    labelg = Label(root,text='Red:').pack()
    sboxg = Spinbox(root,from_=0, to=255,command=drawrgb)
    sboxg.pack()

    labelb = Label(root,text='Red:').pack()
    sboxb = Spinbox(root,from_=0, to=255,command=drawrgb)
    sboxb.pack()

    labelrgb = Label(root,text='Display').pack()
    canvas1=Canvas(root, width=300,height=100)
    canvas1.pack()
    
    root.mainloop()