ValueError: Error when checking : expected input_1 to have 4 dimensions, but got array with shape

原因：預測的時候給的是數組，需要轉成array。

正确的寫法：

emotion_classifier=load_model("weights_best_simple_model.h5")

t1=time.time()

image = cv2.imdecode(np.fromfile('0.jpg', dtype=np.uint8), -1)

# load the image, pre-process it, and store it in the data list

image = cv2.resize(image, (norm_size, norm_size), interpolation=cv2.INTER_LANCZOS4)

image = img_to_array(image)

imagelist.append(image)

imageList = np.array(imagelist, dtype="float") / 255.0

pre=np.argmax(emotion_classifier.predict(imageList))