PyPSA/linopy

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Linear optimization with N-D labeled arrays in Python

Stars: 257
Forks: 87
Open beginner issues: 1
Indexed issues: 60
Avg merge: 1d 15h
Merged PRs (30d): 32

Dominant language: Python
License: MIT
Last GitHub push: Sep 8, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

Open All

add_piecewise_formulation use case: snapshot-dimensioned breakpoints (PyPSA/PyPSA#1914) Open

enhancement model formulation

Difficulty 1/5 Under an hour Newbie friendliness 35/100

PyPSA/linopy#953 · Opened Sep 10, 2026
Mosek output not shown in console when log_fn is set Open

bug solver interface

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

PyPSA/linopy#948 · Opened Sep 8, 2026
CSRConstraint drops auxiliary coordinates when a sparse expression becomes a constraint Open

bug data-model sparse

Difficulty 4/5 3-5 days Newbie friendliness 62/100

PyPSA/linopy#941 · Opened Sep 7, 2026
Zero culling forces model rebuilding Open

bug data-model performance

Difficulty 4/5 3-5 days Newbie friendliness 58/100

PyPSA/linopy#925 · 1 comment · Opened Sep 4, 2026
spec: grouped operators crash on string labels under pandas 3.0 (ArrowStringArray) Open

bug math-spec

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

PyPSA/linopy#924 · Opened Sep 4, 2026
Math-spec integration Open

enhancement math-spec

Difficulty 5/5 Over a week Newbie friendliness 35/100

PyPSA/linopy#919 · 2 comments · Opened Sep 3, 2026
Add LazyExpresssions Open

data-model enhancement math-spec

Difficulty 5/5 Over a week Newbie friendliness 25/100

PyPSA/linopy#888 · Opened Aug 12, 2026
Move to mkdocs (or equivalent) for docs Open

documentation

Difficulty 5/5 Over a week Newbie friendliness 35/100

PyPSA/linopy#873 · 3 comments · Opened Jul 27, 2026
Plan: v1 semantics community discussion (open after #717 merges) Open

discussion model formulation v1

Difficulty 4/5 3-5 days Newbie friendliness 35/100

PyPSA/linopy#857 · Opened Jul 20, 2026
Remove legacy semantics at linopy 1.0 (Stage 3) Open

model formulation refactor v1

Difficulty 4/5 3-5 days Newbie friendliness 45/100

PyPSA/linopy#846 · Opened Jul 16, 2026
Make v1 the default arithmetic convention (Stage 2) Open

enhancement model formulation v1

Difficulty 5/5 Over a week Newbie friendliness 35/100

PyPSA/linopy#845 · Opened Jul 16, 2026
CodSpeed regression: highspy 1.15.0 addRows ~4x slower in direct HiGHS handoff (#809 bump) Open

bug dependencies performance solver interface

Difficulty 4/5 3-5 days Newbie friendliness 45/100

PyPSA/linopy#813 · Opened Jul 2, 2026
Add Variable.reindex (mirroring LinearExpression.reindex) Open

data-model enhancement

Difficulty 3/5 1-2 days Newbie friendliness 58/100

PyPSA/linopy#800 · 2 comments · Opened Jun 30, 2026
Add a `mask` parameter to `add_piecewise_formulation` Open

enhancement model formulation

Difficulty 4/5 3-5 days Newbie friendliness 50/100

PyPSA/linopy#799 · Opened Jun 29, 2026
Design: Model.restrict / advance — slice a model along a coordinate and condition on boundary values (rolling horizon) Open

data-model discussion enhancement performance

Difficulty 5/5 Over a week Newbie friendliness 38/100

PyPSA/linopy#768 · 10 comments · Opened Jun 7, 2026
Split dev-facing extras into PEP 735 dependency groups (and the pip ≥ 25.1 implication) Open

dependencies refactor

Difficulty 3/5 1-2 days Newbie friendliness 52/100

PyPSA/linopy#763 · Opened Jun 5, 2026
Umbrella: long-format / sparse `_term` kernel (dense-`_term` memory cluster) Open

data-model enhancement performance sparse

Difficulty 5/5 Over a week Newbie friendliness 35/100

PyPSA/linopy#756 · 1 comment · Opened Jun 4, 2026
groupby-sum pads every group to the largest group size Open

data-model enhancement performance

Difficulty 5/5 Over a week Newbie friendliness 25/100

PyPSA/linopy#745 · 1 comment · Opened Jun 3, 2026
Tighten type hints on add_variables / add_constraints / add_objective Open

data-model refactor

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

PyPSA/linopy#734 · 1 comment · Opened May 27, 2026
Variable.update() / Constraint.update() should validate inputs the same way add_variables() / add_constraints() do Open

data-model enhancement

Difficulty 4/5 3-5 days Newbie friendliness 45/100

PyPSA/linopy#731 · 1 reaction · Opened May 27, 2026
Opt-in allocator arena release after Model.solve() to bound RSS across sequential solves Open

enhancement performance

Difficulty 4/5 3-5 days Newbie friendliness 42/100

PyPSA/linopy#720 · 3 comments · Opened May 21, 2026
Extend xarray method coverage on Variable / LinearExpression Open

data-model discussion enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

PyPSA/linopy#703 · 4 comments · Opened May 20, 2026
Audit CPLEX license-slot leaks Open

bug solver interface

Difficulty 4/5 3-5 days Newbie friendliness 45/100

PyPSA/linopy#696 · 2 comments · Opened May 19, 2026
Refactor OETC as a `Solver` subclass Open

refactor solver interface

Difficulty 5/5 Over a week Newbie friendliness 45/100

PyPSA/linopy#683 · Opened May 16, 2026
Multivariate piecewise Open

enhancement model formulation

Difficulty 5/5 Over a week Newbie friendliness 35/100

PyPSA/linopy#666 · 2 comments · Opened Apr 29, 2026
Add model diagnostics module Open

data-model enhancement performance

Difficulty 5/5 Over a week Newbie friendliness 30/100

PyPSA/linopy#645 · 2 comments · Opened Apr 7, 2026
Text-based (YAML) math definition interface Open

enhancement math-spec UI

Difficulty 5/5 Over a week Newbie friendliness 38/100

PyPSA/linopy#561 · 22 comments · 2 reactions · Opened Jan 28, 2026
Deprecation in xpress Python interface Open

bug solver interface

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

PyPSA/linopy#533 · 1 comment · Opened Dec 16, 2025
More control over solver logs and printing to console Open

enhancement solver interface

Difficulty 4/5 3-5 days Newbie friendliness 35/100

PyPSA/linopy#504 · 1 comment · Opened Sep 24, 2025
GAMS Solvers compatibility Open

enhancement solver interface

Difficulty 5/5 Over a week Newbie friendliness 35/100

PyPSA/linopy#461 · Opened Jun 11, 2025
Quadratic Constraints and/or objective Open

enhancement model formulation

Difficulty 5/5 Over a week Newbie friendliness 35/100

PyPSA/linopy#444 · 2 comments · Opened Apr 17, 2025
Solvers callback Open

enhancement solver interface

Difficulty 5/5 Over a week Newbie friendliness 25/100

PyPSA/linopy#392 · 1 reaction · Opened Dec 12, 2024
Question about support for Non-Linear Programs Open

discussion model formulation question

Difficulty 5/5 Over a week Newbie friendliness 25/100

PyPSA/linopy#384 · 2 comments · Opened Nov 25, 2024
CPLEX: Optimal solution with unscaled infeasibilities is thrown out Open

bug solver interface

Difficulty 4/5 3-5 days Newbie friendliness 38/100

PyPSA/linopy#368 · 2 comments · Opened Oct 30, 2024
Check exposed types Open

data-model refactor

Difficulty 4/5 3-5 days Newbie friendliness 25/100

PyPSA/linopy#367 · 1 comment · Opened Oct 30, 2024
Compute IIS if problem is infeasible for solver COPT Open

enhancement solver interface

Difficulty 4/5 3-5 days Newbie friendliness 35/100

PyPSA/linopy#358 · Opened Oct 10, 2024
Explore PytOptInferface for writing matrix over native C API Open

discussion performance solver interface

Difficulty 5/5 Over a week Newbie friendliness 25/100

PyPSA/linopy#271 · 9 comments · Opened Apr 10, 2024
Support for sparse xarrays Open

data-model enhancement sparse

Difficulty 5/5 Over a week Newbie friendliness 35/100

PyPSA/linopy#248 · 34 comments · Opened Mar 7, 2024
Support constant values in objective Open

data-model enhancement model formulation

Difficulty 5/5 Over a week Newbie friendliness 30/100

PyPSA/linopy#236 · 9 comments · Opened Feb 23, 2024
How to add multi-objectives？ Open

model formulation question solver interface

Difficulty 5/5 Over a week Newbie friendliness 20/100

PyPSA/linopy#233 · 7 comments · Opened Feb 21, 2024
Optionally release memory during solving process Open

enhancement performance

Difficulty 4/5 3-5 days Newbie friendliness 42/100

PyPSA/linopy#219 · 5 comments · 1 reaction · Opened Jan 18, 2024
The vision and the future of Linopy Open

discussion

Difficulty 5/5 Over a week Newbie friendliness 20/100

PyPSA/linopy#207 · 6 comments · Opened Nov 22, 2023
Second Order Cone Open

enhancement model formulation

Difficulty 5/5 Over a week Newbie friendliness 20/100

PyPSA/linopy#126 · 1 comment · 1 reaction · Opened May 27, 2023
contact https://neos-server.org/neos/ for adding remote solving option? Open

enhancement solver interface

Difficulty 5/5 Over a week Newbie friendliness 15/100

PyPSA/linopy#24 · Opened Feb 24, 2022
Add scaling module Open

enhancement model formulation

Difficulty 5/5 Over a week Newbie friendliness 20/100

PyPSA/linopy#22 · 2 comments · 2 reactions · Opened Feb 14, 2022
Revise Documentation Open

documentation

Difficulty 4/5 3-5 days Newbie friendliness 25/100

PyPSA/linopy#20 · 13 comments · Opened Jan 19, 2022
Add `PuLP` migration guide Open

documentation

PyPSA/linopy#3 · 2 comments · 1 assignee · Opened Jun 22, 2021

PyPSA/linopy

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