Update app.py

app.py

@@ -11,7 +11,7 @@ import requests
 
 def binary_array_to_hex(arr: np.ndarray) -> str:
     """Convert a binary array to a hex string."""
-    bit_string = ''.join(str(b) for b in arr.flatten())
+    bit_string = ''.join(str(int(b)) for b in arr.flatten())
     width = int(np.ceil(len(bit_string) / 4))
     return '{:0>{width}x}'.format(int(bit_string, 2), width=width)