#! /usr/bin/python
# File: switches.py
#       Makes 7 switches with 7 bulbs and connections between them

from Tkinter import *

def flipswitch(x):
    print "switch",x
    pass

root = Tk() ## create a Tk root widget. This is an ordinary window
K = 7 ## number of switches 
N = K ## number of bulbs

switchrow = 2             ## where to put the switches in the grid
bulbrow   = switchrow+1   ## where to put the bulbs

## make labels and put them on these two rows
switchlabel = Label(root, text="switches", bg="red")
switchlabel.grid(row=switchrow,column=0)

bulblabel = Label(root, text="bulbs")
bulblabel.grid(row=bulbrow,column=0)

blip = IntVar()
blip.set(1)
blop = IntVar()
blop.set(0)

def blah():
    print "you pressed the button!"
    print "the value of blip is ", blip.get()
    print "the value of blop is ", blop.get()
    blop.set(1)
    print "the value of blop is ", blop.get()
    pass

extra = Checkbutton( root , text="ex" , command=blah, variable=blip)
extra.grid( row=7, column=4)
extra2 = Checkbutton( root , text="ex2" ,  variable=blop)
extra2.grid( row=7, column=5)
## make the switches
s =[]          ## this list will contain the Variables associated with the switches
switches = []  ## this list will contain the graphical switch objects
for k in range(K) :
    s.append( IntVar() ) ## this makes the integer variable s[k]
    functionname = eval('lambda: flipswitch('+str(k)+')' ) ## create the string   lambda: flipswitch(1)
    ## and evaluate it, thus creating a function. 
    ## This makes switches[k]
    switches.append( Checkbutton( root , text=k , command=functionname , variable=s[k] ) )
    switches[k].grid(row=switchrow,column=k+1)

root.mainloop()