fix(python): default ImageResponse buffers to empty bytes/list

PythonClient/airsim/types.py

@@ -323,8 +323,8 @@ def __init__(self, camera_name, image_type, pixels_as_float = False, compress =
 
 
 class ImageResponse(MsgpackMixin):
-    image_data_uint8 = np.uint8(0)
-    image_data_float = 0.0
+    image_data_uint8 = b""
+    image_data_float = []
     camera_position = Vector3r()
     camera_orientation = Quaternionr()
     time_stamp = np.uint64(0)

PythonClient/tests/__init__.py

@@ -0,0 +1 @@
+

PythonClient/tests/test_image_response_types.py

@@ -0,0 +1,21 @@
+import unittest
+
+from airsim.types import ImageResponse
+
+
+class TestImageResponseDefaults(unittest.TestCase):
+    def test_default_buffers_are_empty_iterables(self):
+        r = ImageResponse()
+        self.assertIsInstance(r.image_data_uint8, (bytes, bytearray))
+        self.assertEqual(len(r.image_data_uint8), 0)
+        self.assertIsInstance(r.image_data_float, list)
+        self.assertEqual(len(r.image_data_float), 0)
+        # Sample code paths
+        self.assertEqual(len(r.image_data_uint8), 0)
+        import numpy as np
+        arr = np.frombuffer(r.image_data_uint8, dtype=np.uint8)
+        self.assertEqual(arr.size, 0)
+
+
+if __name__ == "__main__":
+    unittest.main()