I suspect you didn't mean to use self.scalar...;

mr-wook · mr-wook · commit ad88b840589d · 2020-06-01T15:18:51.000-07:00
diff --git a/gameobjects/vector3.py b/gameobjects/vector3.py
@@ -429,7 +429,7 @@ def vector_div(self, vector):
 
     def get_scalar_div(self, scalar):
 
-        x, y, z = self.scalar
+        x, y, z = scalar
         return self.from_floats(x / scalar, y / scalar, z / scalar)
 
     def get_vector_div(self, vector):
