Question

我正在研究人脸识别项目，其中训练了模型。预测我加载图像，并想计算2张图像之间的距离。在进行预防时，我遇到以下错误：

             TypeError                                 Traceback (most recent call last)
       <ipython-input-21-0b1f36824e17> in <module>()
  8   if(cropped_img == type(None)):
  9     cropped_img = np.zeros(shape = (224, 224))
  ---> 10   img = (load_image(cropped_img) / 255.).astype(np.float32)
 11   img = cv2.resize(img, dsize = (224,224))
 12   embedding_vector = vgg_face_descriptor.predict(np.expand_dims(img, axis=0))[0]

 <ipython-input-9-6d96fb74d85b> in load_image(path)
  4     # OpenCV loads images with color channels
  5     # in BGR order. So we need to reverse them
  ----> 6     return img[...,::-1]

 TypeError: 'NoneType' object is not subscriptable

代码在下面

      NoneType = type(None)


embedding =[]
for i, m in enumerate(metadata):
   cropped_img = m.image_path()
   print(i)
  if(cropped_img == type(None)):
     cropped_img = np.zeros(shape = (224, 224))
  img = (load_image(cropped_img) / 255.).astype(np.float32)
  img = cv2.resize(img, dsize = (224,224))
  embedding_vector = vgg_face_descriptor.predict(np.expand_dims(img, axis=0))[0]

  embedding.append(embedding_vector)

加载图像代码如下：

       def load_image(path):
         img = cv2.imread(path, 1)
         # OpenCV loads images with color channels
         # in BGR order. So we need to reverse them
         return img[...,::-1]

由于我是python新手，所以我无法理解此错误的含义

Answer 1

public static void PaypalPayment() throws InterruptedException {

        driver.DOSTUFF...blah blah blah

        driver.findElement(By.id("email")).sendKeys("blah blah");
        driver.findElement(By.id("btnNext")).click();

        driver.findElement(By.id("password")).sendKeys("blah blah");
        driver.findElement(By.id("btnLogin")).click();

        wait.until(ExpectedConditions.visibilityOfElementLocated(By.id("button")));

因此，如果>>> None == type(None) False为None，则您的比较cropped_img将为if(cropped_img == type(None)):。因此，False将永远不会执行，因此cropped_img = np.zeros(shape = (224, 224)) 将保留为cropped_img 并将传递给None，这是错误消息显示，不适用于load_image。

您应该这样检查：

None

Answer 2

下面的代码将解决问题，因为imread给出None

     def load_image(path):
       img = cv2.imread(path, 1)
        if type(img) == type(None):
           img = np.zeros(shape = (224, 224))
     # OpenCV loads images with color channels
     # in BGR order. So we need to reverse them
       return img[...,::-1]

错误“ NoneType”对象的含义是不能下标的

2 个答案: