Adding Chapter 3 files

Chapter3/classes/snippets.py

@@ -0,0 +1,13 @@
+#snippet.py
+class Name:
+    def __init__(self):
+        self.first = "John"
+
+class Name:
+    #class attributes
+    c_name_length = 80
+
+    #constructor
+    def __init__(self, first, last):
+        self.i_first = first    #i_first is an instance attribute
+        self.i_last = last      #i_last is an instance attribute