Question:Programming a game grid ...

Wed Jun 27 19:24:30 EDT 2012

First, you should be getting an error on
vars()[var] = Button(f3, text = "00", bg = "white")
as vars() has not been declared and it does not appear to be valid Python syntax. I don't see a reason to store a reference to the button since you won't be modifying them. Also, you can not mix pack() and grid(). It produces unpredictable results.
try:
 import Tkinter as tk ## Python 2.x
except ImportError:
 import tkinter as tk ## Python 3.x
def leftclick(*args):
 print "leftclick called"
def rightclick(*args):
 print "rightclick called"
root = tk.Tk() 
f3 = tk.Frame(root, bg = "white", width = 500) 
f3.grid()
this_row=0
this_column=0
for ctr in range(0, 89):
 b = tk.Button(f3, text = "%0d" % (ctr), bg = "white") 
 b.grid(row=this_row, column=this_column) 
 b.bind('<Button-1>', leftclick) # bind left mouse click 
 b.bind('<Button-3>', rightclick) # bind left mouse click
 this_column += 1
 if this_column > 6:
 this_column=0
 this_row += 1
root.title('Puzzle Grid') 
root.mainloop()