Update app.py

app.py

@@ -17,7 +17,7 @@ def query(filename):
 
 def rb(img):
     # response = requests.post(API_URL, headers=headers, data=bytes(img.tobytes("raw")))
-    response = requests.post(API_URL, headers=headers, data=io.BytesIO(img))
+    response = requests.post(API_URL, headers=headers, data=bytearray(img))
     return response.json()
 
 # train = os.listdir("./")