. import tkinter as tk from tkinter import filedialog as fd  a="" str0 = "e" class Browse(tk.Frame):     """ Creates a frame that contains a button when clicked lets the user to select     a file and put its filepath into an entry.     """         def __init__(self, master, initialdir='', filetypes=()):         super().__init__(master)         self.filepath = tk.StringVar()         self._initaldir = initialdir         self._filetypes = filetypes         self._create_widgets()         self._display_widgets()      def _create_widgets(self):         self._entry = tk.Entry(self, textvariable=self.filepath, font=("bold", 00))         a