Tkinter Entry Box Font not changing with default

I have a GUI for an application I am building, and I want to give users the option to update the font style and size. Below is what I have done so far and this works for changing the font on buttons & labels, but it doesn't change the font of any of the Entry() widgets, which is probably the most important text I want the user to be able to change. I know I can initialize the Entry() widget font by providing something like this font=('Arial Bold', 16) which works, but it doesn't allow the user any control.

I did figure out that you can change specific widgets using .config(font=('Arial Bold', 16)). So theoretically, I could include this in my apply_font() function for every Entry() widget, but that can't be the only way, right? I imagine there has to be a way to globally edit the font all Entry() widgets use.

How can I accomplish this?

def call_font_window():
    font_window = tk.Toplevel()
    font_window.title('Fonts')
    font_window.resizable(False, False)
    font_window.geometry('350x150')
    font_window.grid_columnconfigure(1, weight=1)

    font_type_label = tk.Label(font_window, text='Font Type: ')
    font_size_label = tk.Label(font_window, text='Font Size: ')  

    font_type_options = [def_family, 'Calibri', 'Arial', 'Arial Bold', 'Times New Roman']
    font_size_options = [def_size, 10, 12, 14, 16]

    font_type_entry = tk.OptionMenu(font_window, font_type_var, *font_type_options)
    font_size_entry = tk.OptionMenu(font_window, font_size_var, *font_size_options)

    font_type_label.grid(row=0, column=0, sticky='NEW')
    font_size_label.grid(row=1, column=0, sticky='NEW')
    font_type_entry.grid(row=0, column=1, sticky='NEW')
    font_size_entry.grid(row=1, column=1, sticky='NEW')

    def apply_font():
        def_font.configure(family=font_type_var.get(), size=font_size_var.get())


    apply_button = tk.Button(font_window, text='Apply', command=apply_font)
    apply_button.grid(row=2, column=1, sticky='NEW')

    font_window.grab_set()
    font_window.mainloop()

.
.
.

def_font = font.nametofont("TkDefaultFont")
def_family = copy.deepcopy(def_font['family'])
def_size = copy.deepcopy(def_font['size'])
font_type_var = tk.StringVar(value=def_font['family'])
font_size_var = tk.IntVar(value=def_font['size'])

menubar = tk.Menu(root)
view_options = tk.Menu(menubar, tearoff=0) 
view_options.add_command(label="Font", command=call_font_window)
view_options.add_separator() 
menubar.add_cascade(label="View", menu=view_options)
root.config(menu=menubar)
.
.
.

All the widgets fonts do not specifies by TkDefaultFont font. Go to TkDocs Tutorial - Fonts Standard Fonts section for more information.

You had better chage apply_font function as follow:

def apply_font():
    font_ = font.nametofont("TkDefaultFont")
    font_.configure(family=font_type_var.get(), size=font_size_var.get())
    font_ = font.nametofont("TkTextFont")
    font_.configure(family=font_type_var.get(), size=font_size_var.get())

I figured out a solution, though I don't think it is the best way to go about this so please provide alternatives if they are available.

I imported gc (garbage collector) and added the following to my apply_font function:

for obj in gc.get_referrers(tk.Entry):
            if obj.__class__ is tk.Entry:
                obj.config(font=(font_type_var.get(), font_size_var.get()))

I'm calling this a win for now as it does the thing I'd like it to do.