PEP 8 Code Style for Python

This is a document based on PEP 8 that provides guidelines on how to write Python code. The primary focus is to improve the readability and consistency of codes. Doing these principles helps us to review each other's codes more easily and to understand the project changes over time.

1. PEP 8 naming conventions

2. PEP 8 code layout

3. PEP 8 comments