Python tkinter: Sorting the contents of an OptionMenu widget

There is a set of insert_something() methods in Menu. You must keep your list sorted with each insert (bisect module).

from tkinter import *import bisect...                else:                                                                       # Dropdown menu option addition                    index = bisect.bisect(self.myOptions, self.numToAdd)                    self.myOptions.insert(index, self.numToAdd)                    self.optMenu['menu'].insert_command(index, label=self.numToAdd)                    self.selOpt.set(self.numToAdd)                    print("Added succesfully!", self.myOptions)                    self.counter += 2

Replace the line:

self.optMenu['menu'].add_command(label = self.numToAdd)

with:

for dit in self.myOptions:    self.optMenu['menu'].delete(0)for dat in self.myOptions:    self.optMenu['menu'].add_command(label = dat)

The gotcha is that "add_command" takes the item to add to the menu, while "delete" takes the index of the item.

It seems that whatever way i choose to follow on this one, it all comes down to updating
the widget.
Updating a frame usually redraws a portion or the whole frame if needed.
So i went back to square one. I destroyed the widget, updated the list and then created it again.
As for the position, i used a label as a background only for the OptionMenu.
That way i can delete/replace my OptionMenu as i please, without moving any widgets around, as long as it stays inside it's label and it's the only one in there and of course as long as i don't move any labels.

This probably is a workaround, not a solution, but it get's the job done and with a bit
of optimization it can be used for any other widget having the same problem.

from tkinter import *class DropdownExample(Frame):    def __init__(self, master = None):        Frame.__init__(self, master)        self.pack(fill = 'both', expand = True)        # Add Option Button        self.addOptBtn = Button(self, text = "Add Option", command = self.add_option)        # Option Input Field        self.newOpt = IntVar()        self.newOpt.set("Type a number")        self.optIn = Entry(self)        self.optIn['textvariable'] = self.newOpt        # Dropdown Menu        # menu's label        self.optMenuLabel = Label(self)        # option menu        self.myOptions = [0, 1, 2]        self.selOpt = IntVar()        self.selOpt.set("Options")        self.optMenu = OptionMenu(self.optMenuLabel, self.selOpt, *self.myOptions)        # Positioning        self.addOptBtn.pack(side = 'left', padx = 5)        self.optIn.pack(side = 'left', padx = 5)        self.optMenuLabel.pack(side = 'left', padx = 5)        self.optMenu.pack(side = 'left', padx = 5)    def add_option(self):        self.numToAdd = ""        self.counter = 0        try:            self.numToAdd = int(self.optIn.get())                                           # Integer validation            while self.counter < len(self.myOptions):                                       # Comparison loop & error handling                if self.numToAdd == self.myOptions[self.counter]:                    print("Already exists!")                                        break;                elif self.numToAdd < 0:                    print("No less than 0!")                    break;                elif self.counter < len(self.myOptions)-1:                    self.counter += 1                else:                                                                       # Dropdown menu option addition                    self.myOptions.append(self.numToAdd)                    self.myOptions.sort()                    self.selOpt.set(self.numToAdd)                    self.optMenu.destroy()                    self.optMenu = OptionMenu(self.optMenuLabel, self.selOpt, *self.myOptions)                    self.optMenu.pack(side = 'left', padx = 5)                    print("Added succesfully!", self.myOptions)                    break;        except ValueError:            print("Type ONLY numbers!")def runme():    app = DropdownExample()    app.master.title("Dropdown Menu Example")    app.master.resizable(0, 0)    app.mainloop()runme()