changed grade import to the top.

app.py

@@ -1,6 +1,8 @@
 from tensorflow.keras.models import load_model 
 import numpy as np
 import cv2
+import gradio as gr
+
 
 model = load_model('model-3.h5')
 
@@ -11,7 +13,6 @@ def predict_from_img(img):
   output = model.predict(img)[0][0]
   return {'NORMAL':float(output),'PNEUMONIA':float(1-output)}
 
-import gradio as gr
 image = gr.inputs.Image(shape=(150,150))
 label = gr.outputs.Label(num_top_classes=2)
 gr.Interface(fn=predict_from_img, inputs=image, outputs=label,title = 'PNEUMONIA-DETECTION').launch()