added readme for factory pattern

Author: Sean-Bradley

factory/README.md

@@ -0,0 +1,38 @@
+# Factory Design Pattern
+
+The Factory Pattern is a creational pattern that defines an Interface for creating an object and defers instantiation until runtime.
+
+Used when you don't know how many or what type of objects will be needed until or during runtime
+
+![Factory Pattern Overview](factory_pattern.png)
+
+The Factory Pattern in the context of a Chair Factory
+![Factory Pattern In Context](factory_pattern_chair.png)
+
+```python
+class ChairFactory:  
+    """Tha Factory Class"""
+
+    @staticmethod
+    def get_concrete_object(object_type):
+        """A static method to get a concrete object of type class"""
+        try:
+            if object_type == "ObjectA":
+                return ObjectA()
+            if object_type == "ObjectB":
+                return ObjectB()
+            if object_type == "ObjectC":
+                return ObjectC()
+            raise AssertionError("Object Not Found")
+        except AssertionError as _e:
+            print(_e)
+        return None
+```
+
+Each Object implements the a Common Interface
+```python
+class ObjectA(IObjectType):  
+    """The Object Concrete Class which implements the IObjectType interface"""
+
+    ...
+```