import cv2, glob

images = glob.glob("*.png")
print(images)

for image in images:
    print("Hello")
    img = cv2.imread(image, -1)
    re=cv2.resize(img, (int(img.shape[1]*2), int(img.shape[0]*2)))
    cv2.imshow("Checking", re)
    cv2.waitKey(500)
    cv2.destroyAllWindows()
    cv2.imwrite("resized_"+image, re)