xaddpy 0.1.6

XADD package in Python

Python Implementation of XADD

This repository implements the Python version of XADD (eXtended Algebraic Decision Diagrams) which was first introduced in Sanner et al. (2011); you can find the original Java implementation from here.

Our Python XADD code uses Sympy for symbolically maintaining all variables and related operations, and PULP is used for pruning unreachable paths. Note that we only check linear conditionals. If you have Gurobi installed and configured in the conda environment, then PULP will use Gurobi for solving (MI)LPs; otherwise, the default solver (CBC) is going to be used.

Note that the implementation for EMSPO --- Exact symbolic reduction of linear Smart Predict+Optimize to MILP (Jeong et al., ICML-22) --- has been moved to the branch emspo.

Installation

Load your Python virtual environment then type the following commands for package installation

pip install xaddpy

# Optional: if you want to use Gurobi for the 'reduce_lp' method that prunes out unreachable partitions using LP solvers
pip install gurobipy    # If you have a license