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pymc-devs

13 indexed repositories · View on GitHub

pymc
Bayesian Modeling and Probabilistic Programming in Python

Python · 9759 stars
pytensor
PyTensor allows you to define, optimize, and efficiently evaluate mathematical expressions involving multi-dimensional arrays.

Python · 644 stars
pymc-examples
Examples of PyMC models, including a library of Jupyter notebooks.

Python · 398 stars
nutpie
Python wrapper for nuts-rs

Python · 207 stars
pymc-bart

Python · 156 stars
pymc-extras
Powerful add-ons for PyMC

Jupyter Notebook · 143 stars
nuts-rs
A implementation of NUTS in rust

Rust · 109 stars
pytensor-ml
Neural Network package built on Pytensor

Python · 9 stars
bartrs
High-performance Rust-based particle Gibbs sampler for Bayesian additive regression trees

Rust · 8 stars
ptgp
GPs in PyTensor

Jupyter Notebook · 8 stars
pymc-model-catalogue

Python · 6 stars
pytensor-distributions
PyTensor powered distributions

Python · 5 stars
pymc-prop

Python · 4 stars

Beginner friendly Everything

Open All

scaled_dot_product_attention promotes float32 inputs to float64 (uses config.floatX for the scale and causal mask) Open

Difficulty 2/5 1-3 hours Newbie friendliness 86/100

pymc-devs/pytensor-ml#164 · Opened Sep 19, 2026
Numba linker: fgraph_to_python puts fgraph inputs in global_env, preventing numba caching Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

pymc-devs/pytensor#2428 · 1 comment · Opened Sep 18, 2026
MLX: Subtensor and IncSubtensor fail on a symbolic integer index under mx.compile Open

bug indexing mlx

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

pymc-devs/pytensor#2422 · Opened Sep 17, 2026
Give compile_training_step's shared parameters a static shape for JAX and MLX Open

enhancement pytensor

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

pymc-devs/ptgp#54 · 1 comment · Opened Sep 16, 2026
init_mean passed, but never used Open

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

pymc-devs/nutpie#350 · Opened Sep 15, 2026
DOC: Fix raw LaTeX math syntax and grammar in GARCH11 docstring Open

Difficulty 1/5 Under an hour Newbie friendliness 95/100

pymc-devs/pymc#8439 · 1 comment · Opened Sep 14, 2026
BUG: Moyal logcdf returns -inf in lower tail where value is finite Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

pymc-devs/pymc#8437 · 2 comments · Opened Sep 14, 2026
psd_solve_to_chol_solve only tracks b_ndim=2, so solve(A, b, assume_a="pos") with a vector b factors A twice Open

graph rewriting linalg performance

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

pymc-devs/pytensor#2415 · Opened Sep 14, 2026
DOC: Fix documentation formatting, LaTeX, parameter metadata, and type declarations in continuous distributions Open

docs

Difficulty 2/5 1-3 hours Newbie friendliness 83/100

pymc-devs/pymc#8431 · 2 comments · Opened Sep 13, 2026
BUG: HSGP set_boundary causes unhandled divide by zero and inf eigenvalues when feature range is zero Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

pymc-devs/pymc#8427 · 2 comments · Opened Sep 10, 2026
Guard the MLX convolution's rank at compile time Open

enhancement pytensor

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

pymc-devs/pytensor-ml#135 · 1 comment · Opened Aug 28, 2026
test_mlx_eigh compares eigenvector signs, which are arbitrary Open

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

pymc-devs/pytensor#2394 · Opened Aug 26, 2026
Update find_MAP's return type annotation to DataTree Open

Difficulty 1/5 Under an hour Newbie friendliness 90/100

pymc-devs/pymc-extras#751 · Opened Aug 25, 2026
Type mismatch in raw logp return Open

Difficulty 1/5 Under an hour Newbie friendliness 88/100

pymc-devs/nutpie#343 · Opened Aug 25, 2026
PyTorch backend warns on every read-only constant: torch.as_tensor on non-writable array Open

bug torch

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

pymc-devs/pytensor#2365 · 1 comment · Opened Aug 20, 2026
pt.tensor("x") without shape= gives misleading error — default implies optional when it isn't Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

pymc-devs/pytensor#2338 · 1 comment · Opened Aug 10, 2026
TensorType.shape is a mutable plain attribute Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

pymc-devs/pytensor#2330 · 3 comments · Opened Aug 9, 2026
XTensorType.dims and .shape are silently mutable, leaving ndim out of sync Open

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

pymc-devs/pytensor#2329 · 1 comment · Opened Aug 9, 2026
Out-of-Sample Predictions example is outdated for PyMC 6 / pymc-bart 0.12 Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

pymc-devs/pymc-bart#284 · 1 comment · Opened Jul 15, 2026
fit_dadvi fails with gradient_backend="jax" Open

Difficulty 1/5 Under an hour Newbie friendliness 82/100

pymc-devs/pymc-extras#694 · Opened Jun 16, 2026
Nicer formatting for linear responses Open

good first issue

Difficulty 2/5 1-3 hours Newbie friendliness 64/100

pymc-devs/bartrs#12 · Opened Jun 12, 2026
Tests for sequential Monte Carlo Open

good first issue

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

pymc-devs/bartrs#11 · Opened Jun 12, 2026
DOC: Add pre-commit commands to CONTRIBUTING.md Open

Difficulty 1/5 Under an hour Newbie friendliness 86/100

pymc-devs/pytensor#2215 · 1 comment · Opened Jun 11, 2026
DOC: include description for the section with vectorize Open

docs

Difficulty 1/5 Under an hour Newbie friendliness 68/100

pymc-devs/pytensor#2183 · 1 comment · Opened May 28, 2026
Release notes: place maintenance before docs Open

Difficulty 2/5 1-3 hours Newbie friendliness 65/100

pymc-devs/pymc#8296 · 1 comment · Opened May 13, 2026
DOC: add citation files Open

docs

Difficulty 2/5 1-3 hours Newbie friendliness 65/100

pymc-devs/pytensor#2119 · 1 comment · 1 reaction · Opened May 9, 2026
DOC: document f.trust_input=True as MLX hot-loop performance tip Open

docs mlx

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

pymc-devs/pytensor#2093 · Opened Apr 28, 2026
PERF: TensorType.filter is O(N) for foreign array types (mx.array, jax.Array, torch.Tensor) Open

backend compatibility enhancement jax mlx

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

pymc-devs/pytensor#2087 · Opened Apr 28, 2026
Switch example to cmdstanpy Open

Difficulty 1/5 Under an hour Newbie friendliness 72/100

pymc-devs/nutpie#300 · Opened Apr 16, 2026
CDataTypeConstant.signature() is wrong, merge_signature override shouldn't be needed Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

pymc-devs/pytensor#2031 · Opened Apr 6, 2026
postprocessing_vectorize default does not match docs/warnings Open

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

pymc-devs/pymc#8238 · 2 comments · Opened Apr 2, 2026
BUG: BaseHMC doesn't pass `dtype` to ‎`QuadPotentialDiagAdapt` Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

pymc-devs/pymc#8213 · 2 comments · Opened Mar 23, 2026
Link to docs in core notebook Open

beginner friendly dims docs hackathon

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

pymc-devs/pymc#7864 · 5 comments · Opened Jul 22, 2025
Mention XTensorVariable methods in dims module Open

dims docs

Difficulty 2/5 1-3 hours Newbie friendliness 65/100

pymc-devs/pymc#7863 · 3 comments · Opened Jul 22, 2025
Use hatch scripts for testing Open

enhancements good first issue help wanted maintenance

Difficulty 2/5 1-3 hours Newbie friendliness 64/100

pymc-devs/pymc-extras#472 · 7 comments · Opened May 7, 2025
BUG: Progressbar does not update on streamed `stdout` Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

pymc-devs/pymc#7757 · 8 comments · Opened Apr 15, 2025
Upgrade zarr dependency to >= 3.x.x Open

Difficulty 2/5 1-3 hours Newbie friendliness 65/100

pymc-devs/pymc#7752 · 6 comments · 1 reaction · Opened Apr 7, 2025
Error in `examples/samplers/DEMetropolisZ_EfficiencyComparison.ipynb` Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

pymc-devs/pymc-examples#731 · Opened Nov 15, 2024
DOC: format of the initial values for the sample_smc function Open

docs

Difficulty 2/5 1-2 days Newbie friendliness 68/100

pymc-devs/pymc#7283 · 1 comment · 1 reaction · Opened Apr 27, 2024
Guide to build docs locally does not mention PyMC must be installed in a ipykernel named Python3 Open

docs hackathon

Difficulty 1/5 Under an hour Newbie friendliness 68/100

pymc-devs/pymc#7016 · 3 comments · Opened Nov 17, 2023
Clarify predict method is private Open

Difficulty 1/5 1-3 hours Newbie friendliness 62/100

pymc-devs/pymc-bart#112 · Opened Jul 19, 2023
GLM-ordinal-regression should indicate extra dependencies Open

good first issue

Difficulty 2/5 1-3 hours Newbie friendliness 64/100

pymc-devs/pymc-examples#548 · 4 comments · Opened Jun 2, 2023
Make examples notebooks more prominent on page Open

beginner friendly docs help wanted

Difficulty 2/5 1-3 hours Newbie friendliness 65/100

pymc-devs/pymc#6534 · 10 comments · Opened Feb 19, 2023
README: for new contributors to PyMC and/or open source Open

beginner friendly docs

Difficulty 2/5 1-3 hours Newbie friendliness 62/100

pymc-devs/pymc#6492 · 3 comments · 8 reactions · Opened Jan 30, 2023
notebook tag: remove unneeded data tag of CO2 for Gaussian Process (GP) example Open

Difficulty 1/5 Under an hour Newbie friendliness 72/100

pymc-devs/pymc-examples#442 · 1 reaction · Opened Oct 11, 2022

pymc-devs

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