Quaternion Blacklist Handling

This repository addresses the issue of handling operations between SymPy's Quaternion class and other unknown types by introducing a blacklist mechanism. This allows operations like addition, subtraction, multiplication, and division to gracefully handle cases where the operand type is not supported.This repository officially clears the patch #26355 of Sympy's issue list.

Overview

The main goal is to modify the behavior of the Quaternion class without changing its core logic. This is achieved by introducing a blacklist that checks the type of the operand before performing any operations. If the type is in the blacklist, the operation returns NotImplemented, allowing the other operand's right-hand operation (__radd__, __rsub__, etc.) to handle it.

Features

• Blacklist Handling: Introduces a blacklist to handle unsupported operand types.
• Seamless Integration: Modifies the existing Quaternion class with minimal changes.
• Flexible: Allows easy addition of new types to the blacklist.

Implementation

The modifications are done through a patch file (dieter.py) that redefines the core arithmetic operations for the Quaternion class.

Files

• dieter.py: Contains the modified arithmetic operations for the Quaternion class.
• example_usage.py: Provides examples of how to use the modified Quaternion class with the blacklist mechanism.

Usage

Prerequisites

Ensure you have SymPy installed:

pip install sympy