Belief Propagation Python Packages

pyhgf

PyHGF: A neural network library for predictive coding

qector-decoder-v3

Production-grade Rust/Python quantum error correction decoder. 25+ decoder families: MWPM Blossom, Union-Find, BP-OSD, LDPC/qLDPC, belief-matching, CUDA/GPU batch decoding, AutoDecoder 7-tier fallback. PyMatching/Stim/Sinter compatible. Ed25519 license verification. Benchmark evidence included.

aleph-sim

Quantum circuit simulator (state vector, MPS, stabilizer; CPU, CUDA, Metal) and QEC decoders (MWPM, Union-Find, BP-OSD, relay-BP) with a CUDA-Q QEC plugin and open FPGA relay-BP RTL

fbgbp

Optimized belief propagation on arbitrary graphs with binary states.

replicatedfocusingbeliefpropagation

Replicated Focusing Belief Propagation algorithm

fglib

factor graph library

lgnpy

Linear Gaussian Bayesian Networks - Inference, Parameter Learning and Representation. 🖧

fglib2

Clean Factor Graphs in Python

tridec

Vendor-portable GPU decoders for quantum LDPC codes — Triton min-sum BP & Relay-BP on NVIDIA (CUDA), AMD (ROCm), and Apple-silicon (Metal), consuming any stim DetectorErrorModel.

belief-propagation-ldpc

Belief propagation on Tanner graphs (LDPC decoder)