Merge pull request #16240 from olramde:olramde

* Changed plus operator to os.path.join()

* Remove '/' from PATH

modules/objdetect/misc/python/test/test_qrcode_detect.py

@@ -4,7 +4,7 @@
 QR code detect and decode pipeline.
 ===============================================================================
 '''
-
+import os
 import numpy as np
 import cv2 as cv
 
@@ -12,7 +12,7 @@ from tests_common import NewOpenCVTests
 
 class qrcode_detector_test(NewOpenCVTests):
     def test_detect_and_decode(self):
-        img = cv.imread(self.extraTestDataPath + '/cv/qrcode/link_ocv.jpg')
+        img = cv.imread(os.path.join(self.extraTestDataPath, 'cv/qrcode/link_ocv.jpg'))
         detector = cv.QRCodeDetector()
         retval, points, straight_qrcode = detector.detectAndDecode(img)
         self.assertEqual(retval, "https://opencv.org/");