Design Patterns

This is my Design Patterns repository containing state of the art examples of practical usage of Design Patterns in Python.

Gamma Categorization

Design Patterns are typically split into three categories. This is called Gamma Categorization after Erich Gamma, one of Gang of Four authors.

1. Creational Patterns:
   • Deal with the creation (construction) of objects
   • Explicit (constructor) vs. implicit (DI, reflection, etc.)
   • Wholesale (single statement) vs. piecewise (step-by-step)
2. Structural Patterns:
   • Concerned with the structure (e.g. class members)
   • Many patterns are wrappers that mimic the underlying class' interface
3. Behavioral Patterns:
   • They are all different - no central theme

How to run the code locally with Bazel already installed on host

Bazel installation

Install Bazel

Once you have successfully installed Bazel you can run the code using:

bazel test //creational_patterns/factory_pattern

Run the code inside a container

You can use my following Docker image to instantiate a container locally with Ubuntu and Bazel already installed:

docker run -it --rm framaxwlad/ubuntu_dev:latest

There you can simply clone the repository:

git clone https://github.com/FBorowiec/design_patterns.git
cd design_patterns/

And use a bazel command to run the program:

bazel test //structural_patterns/exercises:structural_patterns_test