[Tkinter] tkinter, dropdowns with changing options

[Sheepykins]

from Tkinter import *
import Tkinter as ttk
from ttk import *
 
root = Tk()
root.title("puppet app")
 
# Add a grid
mainframe = Frame(root)
mainframe.grid(column=0,row=0, sticky=(N,W,E,S) )
mainframe.columnconfigure(0, weight = 1)
mainframe.rowconfigure(0, weight = 1)
mainframe.pack(pady = 100, padx = 100)
 
tkvar = StringVar(root)
 
choices = { 'Package','file'}
tkvar.set('Package') # set the default option
 
popupMenu = OptionMenu(mainframe, tkvar, *choices)
Label(mainframe, text="Choose an option").grid(row = 1, column = 1)
popupMenu.grid(row = 2, column =1)
 

def change_dropdown(*args):
    print( tkvar.get() )
 

tkvar.trace('w', change_dropdown)
 
root.mainloop()

So, when someone selects "package", i need another drop down box to appear or another box to have its options change to the package specific attributes.

This is a puppet manifest in its normal form:

package { 'apache2':
  require => Exec['apt-update'],        # require 'apt-update' before installing
  ensure => installed,
}

So the "require" attribute for package, isnt necessary for the 'file' option.

So at the minute, its almost nothing. just a small GUI box, with one drop down.
I'm thinking the options may change using an IF statement? but i'm not sure how to do it.

Any help appreciated.