Update label of Menubutton Checkbuttons in Tkinter - python-2.7

Question

I would like to update the label text of checkbuttons within a menubutton using an update function when a checkbutton is clicked.
I have got around it so far by deleting the whole menubutton and recreating but it doesn't work perfectly and adds unnecessary complexity. Here is what I have so far:
from Tkinter import *
INGREDIENTS = ['cheese','ham','pickle','mustard','lettuce']
def print_ingredients(*args):
values = [(ingredient, var.get()) for ingredient, var in data.items()]
print values
results = []
def update():
values = [(ingredient, var.get()) for ingredient, var in data.items()]
for value in values:
if value[1] == 1:
results.append(value[0])
print results
for value in values:
mb.menu.delete(0)
for ingredient in INGREDIENTS:
if ingredient in results:
on_val = 0
off_val = 1
click = "Clicked!"
else:
on_val = 1
off_val = 0
click = ""
var = IntVar()
mb.menu.add_checkbutton(label=ingredient + " " + click, variable=var, onvalue = on_val, offvalue = off_val, command = update)
data[ingredient] = var # add IntVar to the dictionary
data = {} # dictionary to store all the IntVars
top = Tk()
mb= Menubutton ( top, text="Ingredients", relief=RAISED )
mb.menu = Menu ( mb, tearoff = 0 )
mb["menu"] = mb.menu
for ingredient in INGREDIENTS:
var = IntVar()
mb.menu.add_checkbutton(label=ingredient, variable=var, command = update)
data[ingredient] = var # add IntVar to the dictionary
btn = Button(top, text="Print", command=print_ingredients)
btn.pack()
mb.pack()
top.mainloop()
Is there a way to update the label text of a checkbutton within a menubutton?

Answer 1

You could trace the variables you attached to the checkbuttons. If you name the variables after the ingredients and store them in a dict, you can get the ingredient and the variable in the callback of the trace and change the entry at the right index:
from Tkinter import *
INGREDIENTS = ['cheese','ham','pickle','mustard','lettuce']
def update(var_name, *args):
# Beacause we defined names for the BooleanVars, the first argument is the name of the changed Var
# We named the Vars after the ingredients
ingredient = var_name
# Get the actual var from the dict
var = data[var_name]
# Get the index of the clicked ingredient
i = INGREDIENTS.index(ingredient)
# Check wether the checkbutton is clicked on or not
if var.get() == True:
# If checked, change label to include 'Clicked'
mb.menu.entryconfigure(i, label = ingredient + ' Clicked!')
else:
# If unchecked, change label to just ingredient
mb.menu.entryconfigure(i, label = ingredient)
data = {} # dictionary to store all the IntVars
top = Tk()
mb= Menubutton ( top, text="Ingredients", relief=RAISED )
mb.menu = Menu ( mb, tearoff = 0 )
mb["menu"] = mb.menu
for ingredient in INGREDIENTS:
# Create a Boolean variable with the name of the ingredient
var = BooleanVar(name = ingredient)
# Trace changes to the variable
var.trace("w", update)
# Create Checkbutton without command
mb.menu.add_checkbutton(label=ingredient, variable=var)
# Add variable to the dictionary
data[ingredient] = var
mb.pack()
top.mainloop()