coin-or/python-mip

Python-MIP: collection of Python tools for the modeling and solution of Mixed-Integer Linear programs

Stars: 601
Forks: 108
Open beginner issues: 1
Indexed issues: 111

Dominant language: Linear Programming
License: EPL-2.0
Last GitHub push: Sep 20, 2026
Latest indexed: Sep 15, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted
PR merge metrics: No merged PRs in 30d

Beginner friendly Everything

Open All

cbcbox macOS libraries are killed on load Open

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

coin-or/python-mip#428 · 2 comments · Opened Sep 19, 2026
function/symbol 'Osi_getNumCols' not found in library '/usr/local/lib/libCbc.so': Undefined symbol "Osi_getNumCols" Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

coin-or/python-mip#426 · Opened Sep 14, 2026
SIGILL (Illegal instruction) on process exit, triggered by merely instantiating Model() — ARM64 (Home Assistant Green) Environment Open

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

coin-or/python-mip#425 · 1 comment · Opened Jul 30, 2026
Memory Leak when Using HIGHs solver Open

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

coin-or/python-mip#423 · 4 comments · 3 reactions · Opened May 21, 2026
Model.var_by_name throws error if the model contains no variables when using gurobi as solver Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

coin-or/python-mip#422 · 1 comment · Opened Apr 23, 2026
CBC (of cbcbox) crashes with SIGILL on Linux Open

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

coin-or/python-mip#420 · 4 comments · Opened Mar 25, 2026
Exploding memory CBC solver with 1.14.2 compared to 1.13.0 Open

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

coin-or/python-mip#419 · 2 comments · Opened Dec 3, 2025
ERROR while running Cbc. Signal SIGSEGV caught. Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

coin-or/python-mip#417 · 3 comments · 4 reactions · Opened Sep 12, 2025
parallel CBC Open

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

coin-or/python-mip#416 · 1 comment · Opened Aug 25, 2025
Development state Open

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

coin-or/python-mip#412 · 12 comments · 2 reactions · Opened Jul 22, 2025
Bug about different VarList objects sharing the same components Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

coin-or/python-mip#409 · Opened Jun 30, 2025
The PyPi module cannot be installed with Python version 3.13 Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

coin-or/python-mip#407 · 12 comments · 2 reactions · Opened May 26, 2025
Issue with CBC library in Python-MIP on macOS ARM64 (Apple Silicon) Open

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

coin-or/python-mip#406 · 6 comments · 1 reaction · Opened Jan 21, 2025
difference between solver and solver_name Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

coin-or/python-mip#404 · 1 comment · Opened Jan 7, 2025
Error on using highs as solver Open

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

coin-or/python-mip#403 · 4 comments · Opened Jan 7, 2025
Issue Using Highs-Solver on Windows Open

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

coin-or/python-mip#402 · 5 comments · Opened Jan 6, 2025
set tempdir path for external solvers Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

coin-or/python-mip#401 · 1 comment · Opened Jan 6, 2025
how to set location for temporary files Open

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

coin-or/python-mip#400 · Opened Dec 17, 2024
mip Mac python 3.12 64biit Open

Difficulty 5/5 Over a week Newbie friendliness 10/100

coin-or/python-mip#399 · Opened Nov 27, 2024
Incorrect handling of constraints with identical variables causing infeasible models Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

coin-or/python-mip#396 · 1 reaction · Opened Nov 11, 2024
optimize n-queens: Performance of pre-compiled cbc vs source build Open

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

coin-or/python-mip#393 · 1 comment · Opened Oct 2, 2024
Add arm64 cbc library to complement x86_64 Open

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

coin-or/python-mip#392 · 3 comments · Opened Oct 2, 2024
Silently Crashed Python when Initializing a Model on Windows11 Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

coin-or/python-mip#390 · 1 comment · 3 reactions · Opened Aug 8, 2024
Incorrect imports in Model Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

coin-or/python-mip#388 · 1 comment · Opened Jul 26, 2024
Gurobi FLK license cannot be used Open

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

coin-or/python-mip#386 · 1 reaction · Opened Jul 12, 2024
Crash when instantiating a Model class Open

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

coin-or/python-mip#385 · 2 comments · Opened Jul 11, 2024
New release Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

coin-or/python-mip#384 · 4 comments · 8 reactions · Opened Jun 26, 2024
how can I know the size of the search tree Open

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

coin-or/python-mip#383 · Opened Jun 21, 2024
Tests fail to find the symbol Osi_getIntegerTolerance in lib/libCbcSolver.so Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

coin-or/python-mip#382 · Opened May 7, 2024
ERROR while running Cbc. Macos Open

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

coin-or/python-mip#381 · Opened Apr 19, 2024
Log output not displayed in Jupyter Notebook Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

coin-or/python-mip#379 · Opened Mar 20, 2024
upper bound not reported correctly in CBC Progress Callback Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

coin-or/python-mip#378 · Opened Mar 20, 2024
Python 3.12 Open

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

coin-or/python-mip#376 · 17 comments · 2 reactions · Opened Mar 8, 2024
how to get all or more solutions? Open

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

coin-or/python-mip#375 · Opened Mar 7, 2024
Highs with python-mip is slow Open

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

coin-or/python-mip#372 · 5 comments · 3 reactions · Opened Feb 22, 2024
Constraint creation is not symmetric for combination variable and tensor Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

coin-or/python-mip#371 · Opened Feb 19, 2024
`add_constr` returns broken object when adding constraint without variables Open

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

coin-or/python-mip#364 · 3 comments · Opened Jan 13, 2024
Add py.typed marker Open

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

coin-or/python-mip#362 · 1 comment · 1 reaction · Opened Nov 23, 2023
More verbose errors? Open

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

coin-or/python-mip#357 · 3 comments · Opened Aug 31, 2023
Passing Solver explicitly causes UnboundLocalError Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

coin-or/python-mip#355 · Opened Jun 28, 2023
Explicitly provide supported versions of Cbc Open

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

coin-or/python-mip#351 · 5 comments · 1 reaction · Opened May 9, 2023
Confusing Behaviour with disposing of Gurobi Environment Open

bug gurobi

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

coin-or/python-mip#347 · 1 comment · 1 reaction · Opened Apr 13, 2023
Incorrect n-Queens Constraints? Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

coin-or/python-mip#344 · 1 comment · Opened Apr 8, 2023
Improve Example Code Readability Open

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

coin-or/python-mip#340 · 3 comments · Opened Mar 9, 2023
Supporting SCIP Open

enhancement

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

coin-or/python-mip#338 · 7 reactions · Opened Feb 27, 2023
Wrong results Open

bug cbc

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

coin-or/python-mip#337 · Opened Feb 27, 2023
Name 'cbclib' is not defined Open

cbc help wanted

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

coin-or/python-mip#335 · 21 comments · Opened Feb 26, 2023
Issues running the latest versions of Python-MIP on AWS lambda functions Open

cbc

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

coin-or/python-mip#334 · 8 comments · 1 reaction · Opened Feb 10, 2023
LazyConstraint based MIP yields incorrect optimum Open

bug cbc

Difficulty 4/5 3-5 days Newbie friendliness 30/100

coin-or/python-mip#331 · 6 comments · Opened Jan 9, 2023
Change the default behavior to using CBC, as it should always work? Open

mip

Difficulty 3/5 1-2 days Newbie friendliness 35/100

coin-or/python-mip#329 · 2 reactions · Opened Jan 4, 2023

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