tkinter - Return from inside a function defined inside another function in Python -

i know title isn't clear, i'll try explain in more depth:

i have function f defined inside function g, , want able call f inside g, , make f make g return something. example:

def g():     def f():         return(true) # want g return value when f called     f() # cannot replace return(f()) because context of problem extremely weird. 

because people have requested context:

class color:     def __init__(self, r, g, b):         self.r = r         self.g = g         self.b = b  def requestcolor(default=color(0, 0, 0)):      colorgui = tk.tk()     colorgui.title('select color')      rlabel = label(colorgui, text='r: ', anchor=tk.e)     glabel = label(colorgui, text='g: ', anchor=tk.e)     blabel = label(colorgui, text='b: ', anchor=tk.e)      rentry = entry(colorgui)     gentry = entry(colorgui)     bentry = entry(colorgui)      # 1 method want have return statement in     def savecommand():         colorgui.destroy()         return(color(int(rentry.get()), int(gentry.get()), int(bentry.get())))      # method want have return statement in     def quitcommand():         colorgui.destroy()         return(color(default.r, default.g, default.b))      # want return color when 1 of these buttons pushed.     savebutton = button(colorgui, text='save', command=savecommand)     quitbutton = button(colorgui, text='cancel'command=quitcommand)      rentry.insert(0, default.r)     gentry.insert(0, default.g)     bentry.insert(0, default.b)      rlabel.grid(row=0, column=0, sticky=tk.e)     rentry.grid(row=0, column=1)     glabel.grid(row=1, column=0, sticky=tk.e)     gentry.grid(row=1, column=1)     blabel.grid(row=2, column=0, sticky=tk.e)     bentry.grid(row=2, column=1)     quitbutton.grid(row=3, column=0, sticky=tk.e+tk.w)     savebutton.grid(row=3, column=1, sticky=tk.e+tk.w) 

i made method becasue want able along lines of:

newcolor = requestcolor(oldcolor) 

in several places in program.

one way solve make button commands modify existing color, rather trying return new color.

here working demo based on example code that:

import tkinter tk tkinter import *  class color:     def __init__(self, r, g, b):         self.r = r         self.g = g         self.b = b  def requestcolor(default=color(0, 0, 0)):      # modified later save command     result = color(default.r, default.g, default.b)      colorgui = tk.tk()     colorgui.title('select color')      rlabel = label(colorgui, text='r: ', anchor=tk.e)     glabel = label(colorgui, text='g: ', anchor=tk.e)     blabel = label(colorgui, text='b: ', anchor=tk.e)      rentry = entry(colorgui)     gentry = entry(colorgui)     bentry = entry(colorgui)      def savecommand():         # set new values         result.r = int(rentry.get())         result.g = int(gentry.get())         result.b = int(bentry.get())         colorgui.destroy()      def quitcommand():         # keep default values         colorgui.destroy()      savebutton = button(colorgui, text='save', command=savecommand)     quitbutton = button(colorgui, text='cancel', command=quitcommand)      rentry.insert(0, default.r)     gentry.insert(0, default.g)     bentry.insert(0, default.b)      rlabel.grid(row=0, column=0, sticky=tk.e)     rentry.grid(row=0, column=1)     glabel.grid(row=1, column=0, sticky=tk.e)     gentry.grid(row=1, column=1)     blabel.grid(row=2, column=0, sticky=tk.e)     bentry.grid(row=2, column=1)     quitbutton.grid(row=3, column=0, sticky=tk.e+tk.w)     savebutton.grid(row=3, column=1, sticky=tk.e+tk.w)      colorgui.mainloop()      return result  color = requestcolor()  print('color(%s, %s, %s)' % (color.r, color.g, color.b))