diff --git a/tests/MyGame/MonsterExtra.py b/tests/MyGame/MonsterExtra.py
new file mode 100644
index 0000000..1f7dcb2
--- /dev/null
+++ b/tests/MyGame/MonsterExtra.py
@@ -0,0 +1,138 @@
+# automatically generated by the FlatBuffers compiler, do not modify
+
+# namespace: MyGame
+
+import flatbuffers
+
+class MonsterExtra(object):
+    __slots__ = ['_tab']
+
+    @classmethod
+    def GetRootAsMonsterExtra(cls, buf, offset):
+        n = flatbuffers.encode.Get(flatbuffers.packer.uoffset, buf, offset)
+        x = MonsterExtra()
+        x.Init(buf, n + offset)
+        return x
+
+    @classmethod
+    def MonsterExtraBufferHasIdentifier(cls, buf, offset, size_prefixed=False):
+        return flatbuffers.util.BufferHasIdentifier(buf, offset, b"\x4D\x4F\x4E\x45", size_prefixed=size_prefixed)
+
+    # MonsterExtra
+    def Init(self, buf, pos):
+        self._tab = flatbuffers.table.Table(buf, pos)
+
+    # MonsterExtra
+    def D0(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(4))
+        if o != 0:
+            return self._tab.Get(flatbuffers.number_types.Float64Flags, o + self._tab.Pos)
+        return float('nan')
+
+    # MonsterExtra
+    def D1(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(6))
+        if o != 0:
+            return self._tab.Get(flatbuffers.number_types.Float64Flags, o + self._tab.Pos)
+        return float('nan')
+
+    # MonsterExtra
+    def D2(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(8))
+        if o != 0:
+            return self._tab.Get(flatbuffers.number_types.Float64Flags, o + self._tab.Pos)
+        return float('inf')
+
+    # MonsterExtra
+    def D3(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(10))
+        if o != 0:
+            return self._tab.Get(flatbuffers.number_types.Float64Flags, o + self._tab.Pos)
+        return float('-inf')
+
+    # MonsterExtra
+    def F0(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(12))
+        if o != 0:
+            return self._tab.Get(flatbuffers.number_types.Float32Flags, o + self._tab.Pos)
+        return float('nan')
+
+    # MonsterExtra
+    def F1(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(14))
+        if o != 0:
+            return self._tab.Get(flatbuffers.number_types.Float32Flags, o + self._tab.Pos)
+        return float('nan')
+
+    # MonsterExtra
+    def F2(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(16))
+        if o != 0:
+            return self._tab.Get(flatbuffers.number_types.Float32Flags, o + self._tab.Pos)
+        return float('inf')
+
+    # MonsterExtra
+    def F3(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(18))
+        if o != 0:
+            return self._tab.Get(flatbuffers.number_types.Float32Flags, o + self._tab.Pos)
+        return float('-inf')
+
+    # MonsterExtra
+    def Dvec(self, j):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(20))
+        if o != 0:
+            a = self._tab.Vector(o)
+            return self._tab.Get(flatbuffers.number_types.Float64Flags, a + flatbuffers.number_types.UOffsetTFlags.py_type(j * 8))
+        return 0
+
+    # MonsterExtra
+    def DvecAsNumpy(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(20))
+        if o != 0:
+            return self._tab.GetVectorAsNumpy(flatbuffers.number_types.Float64Flags, o)
+        return 0
+
+    # MonsterExtra
+    def DvecLength(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(20))
+        if o != 0:
+            return self._tab.VectorLen(o)
+        return 0
+
+    # MonsterExtra
+    def Fvec(self, j):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(22))
+        if o != 0:
+            a = self._tab.Vector(o)
+            return self._tab.Get(flatbuffers.number_types.Float32Flags, a + flatbuffers.number_types.UOffsetTFlags.py_type(j * 4))
+        return 0
+
+    # MonsterExtra
+    def FvecAsNumpy(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(22))
+        if o != 0:
+            return self._tab.GetVectorAsNumpy(flatbuffers.number_types.Float32Flags, o)
+        return 0
+
+    # MonsterExtra
+    def FvecLength(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(22))
+        if o != 0:
+            return self._tab.VectorLen(o)
+        return 0
+
+def MonsterExtraStart(builder): builder.StartObject(10)
+def MonsterExtraAddD0(builder, d0): builder.PrependFloat64Slot(0, d0, float('nan'))
+def MonsterExtraAddD1(builder, d1): builder.PrependFloat64Slot(1, d1, float('nan'))
+def MonsterExtraAddD2(builder, d2): builder.PrependFloat64Slot(2, d2, float('inf'))
+def MonsterExtraAddD3(builder, d3): builder.PrependFloat64Slot(3, d3, float('-inf'))
+def MonsterExtraAddF0(builder, f0): builder.PrependFloat32Slot(4, f0, float('nan'))
+def MonsterExtraAddF1(builder, f1): builder.PrependFloat32Slot(5, f1, float('nan'))
+def MonsterExtraAddF2(builder, f2): builder.PrependFloat32Slot(6, f2, float('inf'))
+def MonsterExtraAddF3(builder, f3): builder.PrependFloat32Slot(7, f3, float('-inf'))
+def MonsterExtraAddDvec(builder, dvec): builder.PrependUOffsetTRelativeSlot(8, flatbuffers.number_types.UOffsetTFlags.py_type(dvec), 0)
+def MonsterExtraStartDvecVector(builder, numElems): return builder.StartVector(8, numElems, 8)
+def MonsterExtraAddFvec(builder, fvec): builder.PrependUOffsetTRelativeSlot(9, flatbuffers.number_types.UOffsetTFlags.py_type(fvec), 0)
+def MonsterExtraStartFvecVector(builder, numElems): return builder.StartVector(4, numElems, 4)
+def MonsterExtraEnd(builder): return builder.EndObject()