new examples and fixed clear button

app.py

@@ -6,6 +6,8 @@ import cv2
 model = tf.keras.models.load_model("mymodel/mymodel")
 
 def predict(img):
+    if img is None:
+        return
     z = tf.keras.preprocessing.image.img_to_array(img)
     kernel = np.ones((5,5),np.uint8)
     z = cv2.dilate(z ,kernel,iterations = 1)
@@ -22,7 +24,7 @@ gr.Interface(fn=predict,
              outputs="label",
              live=True,
              examples=[
-             ["writer001_pass01_digit2.png"],
-             ["writer001_pass01_digit4.png"],
-             ["writer001_pass07_digit9.png"],
-             ["writer594_pass06_digit7.png"]]).launch()
+             ["8.png"],
+             ["4.png"],
+             ["9.png"],
+             ["2.png"]]).launch()