ID	Name	Description	Visualization
1	Factory Method	Provides an interface for creating objects in a superclass, but allows subclasses to alter the type of objects that will be created.
2	Abstract Factory	Lets you produce families of related objects without specifying their concrete classes.
3	Builder	Lets you construct complex objects step by step. The pattern allows you to produce different types and representations of an object using the same construction code.
4	Singleton	Lets you ensure that a class has only one instance while providing a global access point to this instance.
5	Prototype	Lets you copy existing objects without making your code dependent on their classes.

ID	Name	Description	Visualization
1	Adapter	Allows objects with incompatible interfaces to collaborate.
2	Bridge	Lets you split a large class or a set of closely related classes into two separate hierarchies - abstraction and implementation - which can be developed independently of each other.
3	Composite	Lets you compose objects into tree structures and then work with these structures as if they were individual objects.
4	Decorator	Lets you attach new behaviors to objects by placing these objects inside special wrapper objects that contain the behaviors.
5	Facade	Provides a simplified interface to a library, a framework, or any other complex set of classes.
6	Flyweight	Lets you fit more objects into the available amount of RAM by sharing common parts of state between multiple objects instead of keeping all of the data in each object.
7	Proxy	Lets you provide a substitute or placeholder for another object. A proxy controls access to the original object, allowing you to perform something either before or after the request gets through to the original object.

ID	Name	Description	Visualization
1	Chain of Responsibility	Lets you pass requests along a chain of handlers. Upon receiving a request, each handler decides either to process the request or to pass it to the next handler in the chain.
2	Command	Turns a request into a standalone object that contains all info about the request. This transformation lets you pass requests as method arguments, delay or queue a request's execution, and support undoable operations.
3	Iterator	Lets you traverse elements of a collection without exposing its underlying representation (list, stack, tree, etc.).
4	Mediator	Lets you reduce chaotic dependencies between objects. The pattern restricts direct communication between the objects and forces them to collaborate only via a mediator object.
5	Memento	Lets you save and restore previous state of an object without revealing the details of its implementation.
6	Observer	Lets you define a subscription mechanism to notify multiple objects about any events that happen to the object they're observing.
7	State	Lets an object alter its behavior when its internal state changes. It appears as if the object changed its class.
8	Strategy	Lets you define a family of algorithms, put each of them into a separate class, and make their objects interchangeable.
9	Template Method	Defines a skeleton of an algorithm in the superclass but lets subclasses override specific steps of the algorithm without changing its structure.
10	Visitor	Lets you separate algorithms from the objects on which they operate.

This project lists UML diagrams of the "Design Pattern Examples in Python". When you click on a diagram image, the diagram will be opened in Diagram Map. If you want to know about Diagram Map, see this post.

1. Abstract Factory	2. Builder	3. Factory Method
Python Code	Python Code	Python Code
4. Prototype	5. Singleton
Python Code	Python Code

1. Adapter	2. Bridge	3. Composite
Python Code	Python Code	Python Code
Decorator	Facade	Flyweight
Python Code	Python Code	Python Code
Proxy
Python Code

1. Chain of Responsibility	2. Command	3. Interpreter
Python Code	Python Code	Python Code
4. Iterator	5. Mediator	6. Memento
Python Code	Python Code	Python Code
7. Observer	8. State	9. Strategy
Python Code	Python Code	Python Code
10. Template Method	11. Visitor
Python Code	Python Code

• Gamma, E. et al. Design Patterns: Elements of Reusable Object-Oriented Software, Addison-Wesley, 1994
• Hiroshi Yuki. Learning Design Patterns in Java [In Japanese Language], Softbank publishing, 2004

• Design Pattern Examples in Python
• Diagram Map: tracing UML/SysML elements across diagrams

Diagram Map file (DiagramMap.html) includes the following libraries:

• D3 library is copyrighted by Mike Bostock and is released under the BSD license.
• Popper library is copyrighted by Federico Zivolo and is released under the MIT license.
• Tippy library is copyrighted by atomiks and is released under the MIT license.