Make structs extendable in Python

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "rlbot-flatbuffers-py"
-version = "0.3.1"
+version = "0.3.2"
 edition = "2021"
 description = "A Python module implemented in Rust for serializing and deserializing RLBot's flatbuffers"
 repository = "https://github.com/VirxEC/rlbot-flatbuffers-py"

build.rs

@@ -253,7 +253,7 @@ impl PythonBindGenerator {
     }
 
     fn generate_struct_definition(&mut self) {
-        self.write_str("#[pyclass(module = \"rlbot_flatbuffers\", get_all, set_all)]");
+        self.write_str("#[pyclass(module = \"rlbot_flatbuffers\", subclass, get_all, set_all)]");
 
         if self.types.is_empty() {
             self.write_str("#[derive(Debug, Default, Clone)]");

pytest.py

@@ -2,7 +2,17 @@
 
 from rlbot_flatbuffers import *
 
+
+class MyVector(Vector3):
+    def __add__(self, other):
+        return MyVector(self.x + other.x, self.y + other.y, self.z + other.z)
+
+
 if __name__ == "__main__":
+    vec1 = MyVector(1, 2, 3)
+    vec2 = Vector3(4, 5, 6)
+    print(vec1 + vec2)
+
     ready_message = ReadyMessage(True, wants_game_messages=True)
     print(repr(ready_message))
     print(ready_message)
@@ -51,7 +61,9 @@
         desired_game_state = DesiredGameState(
             DesiredBallState(DesiredPhysics()),
             car_states=[DesiredCarState(boost_amount=100)],
-            game_info_state=DesiredGameInfoState(game_speed=1, world_gravity_z=-650, end_match=True),
+            game_info_state=DesiredGameInfoState(
+                game_speed=1, world_gravity_z=-650, end_match=True
+            ),
             console_commands=[ConsoleCommand("freeze")],
         )
         total_make_time += time_ns() - start