Test classes with diamond inheritance.

main.py

@@ -6,12 +6,26 @@ class Train:
         self.name = name if name else "#"
     def __str__(self):
         return f"Class {self.class_}({self.name})"
+    def manufacturer(self):
+        return ""
 
-class C315(Train):
-    def __init__(self, name):
-        #Train.__init__(self, 315, name)
-        super().__init__(315, name)
+class BREL(Train):
+    def __init__(self, class_):
+        super().__init__(class_, "")
+    def manufacturer(self):
+        return "BREL"
 
-c315 = C315("Joe")
-print(c315)
+class PEP(Train):
+    def __init__(self, class_):
+        super().__init__(class_, "PEP")
+    def manufacturer(self):
+        return "Unknown"
+
+#The presendence of definitions is the order in the inheritance bracket
+class C315(BREL, PEP):
+    def __init__(self):
+        super(BREL,self).__init__(315)
+
+c315 = C315()
+print(c315, c315.manufacturer())
 del c315