diff --git a/sami/learn-python-the-hard-way/ex42.py b/sami/learn-python-the-hard-way/ex42.py
new file mode 100644
index 0000000..9dc58f2
--- /dev/null
+++ b/sami/learn-python-the-hard-way/ex42.py
@@ -0,0 +1,89 @@
+ ## Animal is-a object (yes, sort of confusing) look at the extra credit
+ class Animal(object):
+
+    pass
+
+ ## dog has an attribute
+ class Dog(Animal):
+
+
+     def __init__(self, name):
+         ## ??
+
+         self.name
+
+ 
+## 
+class Cat(Animal):
+
+
+    def __init__(self, name):
+        ## ??
+        self.name = name
+
+## ??
+class Person(object):
+
+
+    def __init__(self, name):
+        ## ??
+        self.name = name
+
+
+        ## Person has-a pet of some kind194
+
+        self.pet = None
+
+
+## ??
+class Employee(Person):
+
+
+    def __init__(self, name, salary):
+        ## ?? hmm what is this strange magic?
+        super(Employee, self).__init__(name)
+        ## ??
+        self.salary = salary
+
+## ??
+class Fish(object):
+
+    pass
+
+## ??
+class Salmon(Fish):
+
+    pass
+
+## ??
+class Halibut(Fish):
+
+    pass
+
+## rover is-a Dog
+rover = Dog("Rover")
+
+## ??
+satan = Cat("Satan")
+
+## ??
+mary = Person("Mary")
+
+## ??
+mary.pet = satan
+
+## ??
+frank = Employee("Frank", 120000)
+
+## ??
+frank.pet = rover
+
+## ??
+flipper = Fish()
+
+## ??
+crouse = Salmon()
+
+
+## ??
+ harry = Halibut()