coin-or/CyLP

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A Python interface to CLP, CBC, and CGL to solve LPs and MIPs.

Stars: 192
Forks: 70
Open beginner issues: 0
Indexed issues: 65

Dominant language: JetBrains MPS
License: No license data
Last GitHub push: Dec 3, 2025
Latest indexed: Sep 15, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

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65 open issues indexed

lp.rhs seems incorrect Open

coin-or/CyLP#9 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Unable to specify optimization direction Open

coin-or/CyLP#17 · 10 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Cutoff API Implementation Open

coin-or/CyLP#19 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Incorrect basis inverse after solving small LP Open

coin-or/CyLP#20 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Solve fails on problem with only 1 variable Open

coin-or/CyLP#22 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Unable to change single values in the coefficient matrix Open

coin-or/CyLP#24 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Unable to package CyLP with cx_Freeze Open

coin-or/CyLP#25 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Wrong output isRelaxationInfeasible Open

coin-or/CyLP#32 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
addConstraint ignored Open

coin-or/CyLP#33 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Using Cuts produce noisy output (model.logLevel=0) -> desired behaviour? Open

coin-or/CyLP#34 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Hard to use auxiliary variables Open

coin-or/CyLP#37 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
Cutting Plane Usage Open

coin-or/CyLP#38 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Summing over axis Open

enhancement

coin-or/CyLP#42 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
MILP in CBC: Use initial solution to start search from Open

enhancement

coin-or/CyLP#43 · 2 comments · 2 reactions · 0 assignees · Indexed Sep 15, 2026
Solver claims solution is optimal, but violates constraints Open

bug

coin-or/CyLP#48 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Installing cylp in a robust, portable, neat way Open

enhancement

coin-or/CyLP#57 · 10 comments · 7 reactions · 1 assignee · Indexed Sep 15, 2026
Windows install error stdint.h not found Open

bug

coin-or/CyLP#63 · 1 comment · 1 reaction · 0 assignees · Indexed Sep 15, 2026
Unable to Build Offline Documentation Open

documentation

coin-or/CyLP#64 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Very outdated gcc in conda-forge causing CyLP not to build. Open

information

coin-or/CyLP#65 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Is applying customized initial solution supported in CLP Open

information

coin-or/CyLP#66 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Numpy not specied as dependency in setup.py Open

coin-or/CyLP#78 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Incorrect calculation of certain objective functions Open

coin-or/CyLP#79 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
solver status not reported correctly Open

coin-or/CyLP#81 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
contact email bounces, linked documentation outdated Open

coin-or/CyLP#83 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
specify the stdlib flag for installation on latest OSX Open

coin-or/CyLP#85 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Segfault when writing empty MPS file Open

coin-or/CyLP#88 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Indexing by one-dimensional tuples Open

coin-or/CyLP#89 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Use of numpy.matrix not recommended Open

coin-or/CyLP#93 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Issue with single-dimensional variables Open

coin-or/CyLP#96 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Cannot see CBC output, independent of logLevel Setting Open

coin-or/CyLP#99 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Memory leak in CyClpSimplex Open

coin-or/CyLP#102 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
How to change advanced parameters of CBC ? Open

coin-or/CyLP#104 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Segfault when running a test with custom pivot Open

coin-or/CyLP#105 · 8 comments · 2 reactions · 0 assignees · Indexed Sep 15, 2026
CyClpSimplex import and addConstraints/addVariables segfault error Open

coin-or/CyLP#107 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
I want to implement a branch and bound algorithm. How to warm start dual simplex in Cylp? Open

coin-or/CyLP#108 · 12 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
getBasisStatus influence primalVariableSolutionAll Open

coin-or/CyLP#110 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Cylp model for lower bound to be numpy matrix in the constraint Open

coin-or/CyLP#111 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
add constraint for slack variables Open

coin-or/CyLP#112 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Segfault when trying to add PreProcessing for cbcModel Open

coin-or/CyLP#124 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
How to get the dualConstraintSolution from cbcModel? Open

coin-or/CyLP#130 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Segmentation Fault with Python 3.8.12 REPL Tab Completion Open

coin-or/CyLP#134 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Error when using CyLP in PyART Open

coin-or/CyLP#136 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Error in `python': double free or corruption (out) Open

coin-or/CyLP#138 · 13 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
issue when not adding a constraint directly to a model Open

coin-or/CyLP#145 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
multiplication of CyLPExpr by constant not commutative Open

coin-or/CyLP#146 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
How to install cylp on a Windows server in Github Actions? Open

coin-or/CyLP#147 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
getBInvARow, getBInvRow missing Open

coin-or/CyLP#160 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
OsiSolverInterface methods not exposed to Python Open

coin-or/CyLP#161 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
method for setting arbitrary parameters Open

coin-or/CyLP#163 · 1 comment · 1 reaction · 0 assignees · Indexed Sep 15, 2026
how to surpress printing of simplex solver Open

coin-or/CyLP#166 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026

coin-or/CyLP

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