added chapter map to README

22-dyn-attr-prop/pseudo_construction.py

@@ -0,0 +1,10 @@
+# pseudo-code for object construction
+def object_maker(the_class, some_arg):
+    new_object = the_class.__new__(some_arg)
+    if isinstance(new_object, the_class):
+        the_class.__init__(new_object, some_arg)
+    return new_object
+
+# the following statements are roughly equivalent
+x = Foo('bar')
+x = object_maker(Foo, 'bar')