[Tkinter] Toplevel window and global widgets?

[Yoriz]

Use class'es, widgets can be accessed as attributes of the class

import tkinter as tk


class RecordOpenWhichFrame(tk.Toplevel):

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.resizable(0, 0)
        self.geometry('300x100+800+40')
        self.title('Open a record')
#         self.tk.call('wm', 'iconphoto',
#                      self._w, tk.PhotoImage(file='resources/part.png'))
     
        self.entrcrd = tk.Entry(
            self, relief='groove', width=12, font=('Tahoma', '7'))
        self.entrcrd.place(x=205, y=18)
     
        btnopen = tk.Button(self)
        btnopen.place(x=205, y=40)
        btnopen.configure(text='Open Record', width=9, font=('Tahoma', '7'))
     
        btnexit = tk.Button(self)
        btnexit.place(x=205, y=60)
        btnexit.configure(text='Exit', width=9, font=('Tahoma', '7'))
     
        btnopen.configure(command=self.record_to_open)
        btnexit.configure(command=self.destroy)
 
    def record_to_open(self):
        rcrd = self.entrcrd.get()
        RecordOpenFrame(rcrd=rcrd)
        self.destroy()
    

class RecordOpenFrame(tk.Toplevel):

    def __init__(self, *args, **kwargs):
        rcrd = kwargs.pop('rcrd')
        super().__init__(*args, **kwargs)
        self.geometry('300x100+800+40')
        self.title(rcrd)
 

if __name__ == '__main__':
    app = tk.Tk()
    main_window = tk.Frame(app)
    RecordOpenWhichFrame(main_window)
    app.mainloop()