app.py

@@ -46,7 +46,7 @@ class App:
         self.launch_button.pack(side="bottom")
 
     def lets_draw(self):
-        self.image_window = ImageWindow(self.root)
+        self.image_window = ImageWindow(self)
         self.image_window.lets_draw(self.found_images.copy(), self.timer)
 
     def select_folder(self):

image.py

@@ -1,3 +1,4 @@
+import os
 import random
 from tkinter import *
 from PIL import ImageTk, Image, ImageOps
@@ -5,8 +6,9 @@ from util import Util
 
 
 class ImageWindow:
-    def __init__(self, window):
-        self.window = Toplevel(window)
+    def __init__(self, app):
+        self.app = app
+        self.window = Toplevel(app.root)
         self.window.title("Image")
         self.window.geometry("1280x1024")
         self.option = {
@@ -32,6 +34,10 @@ class ImageWindow:
         self.mirror_button = Button(toolbar, relief=FLAT, compound=LEFT, command=self.toggle_mirror, text="mirror")
         self.mirror_button.pack(side=LEFT, padx=0, pady=0)
 
+        self.open_folder_button = Button(toolbar, relief=FLAT, compound=LEFT, command=self.open_folder
+                                         , text="open folder")
+        self.open_folder_button.pack(side=LEFT, padx=0, pady=0)
+
         self.timer_button = Button(toolbar, relief=FLAT, compound=LEFT, command=self.toggle_timer, text="timer")
         self.timer_button.pack(side=LEFT, padx=0, pady=0)
 
@@ -74,7 +80,9 @@ class ImageWindow:
             self.timer_label.pack_forget()
         except TclError:
             self.timer_label.pack(side=RIGHT, ipadx=20)
-        # self.timer_label.config()
+
+    def open_folder(self):
+        os.startfile(self.app.selected_folder)
 
     def lets_draw(self, images, timer):
         random.shuffle(images)