test user id in session

app.py

@@ -32,6 +32,7 @@ if not os.path.exists(OUT_FOLDER):
 @app.route('/', methods=['GET', 'POST'])
 def index():
     user_id = session.get('_id')
+    print(user_id)
     if user_id is None:
         user_id = uuid.uuid4()
         session['_id'] = user_id
@@ -123,9 +124,12 @@ def label(id):
 @app.route('/image/<f>')
 def images(f):
     user_id = session.get('_id')
-    images = app.config["IMAGES"] + f'/{user_id}'
-    print(images, '/', f)
-    return send_file(images +'/'+f)
+    print(user_id)
+    # images = app.config["IMAGES"] + f'/{user_id}'
+    img_path = os.path.join(UPLOAD_FOLDER, f'{user_id}/{f}')
+    # print(images, '/', f)
+    # return send_file(images +'/'+f)
+    return send_file(img_path)
 
 @app.route('/download')
 def download():