CBC MILP Solver

2.929 verified Fri May 01 auth: no python

Binary distribution of the COIN-OR Branch and Cut (CBC) MILP solver for Python. Provides a precompiled CBC binary via Python package, enabling mixed-integer linear programming. Current version 2.929. Release cadence is irregular; follows upstream CBC releases.

pip install cbcbox

Common errors

error ModuleNotFoundError: No module named 'cbcbox' ↓

cause Package not installed or installed in a different environment.

fix

Run pip install cbcbox in the correct Python environment.

error FileNotFoundError: [Errno 2] No such file or directory: '.../cbc' ↓

cause CBC binary missing due to incomplete installation or wrong platform.

fix

Ensure you are on a supported platform (Linux x86_64, macOS x86_64). For others, install CBC via conda or compile from source.

error PermissionError: [Errno 13] Permission denied: '.../cbc' ↓

cause Binary lacks execute permission on Linux/macOS.

fix

Run import subprocess; subprocess.run(['chmod', '+x', str(cbc_path)]) after importing cbcbox.

Warnings

deprecated Some OS-specific wheels are not updated; Linux x86_64 and macOS x86_64 are supported, but ARM macOS may see delays. ↓

fix Use the conda-forge version of CBC or compile from source if your platform lacks a wheel.

gotcha The binary may not have execute permissions after installation on some systems; you may need to chmod +x. ↓

fix Run: import subprocess; subprocess.run(['chmod', '+x', cbc_path])

breaking Version numbering changed between major releases; do not rely on version comparisons. ↓

fix Check for the existence of the binary rather than pinning a specific version.

gotcha cbcbox does not expose a Python API; it only bundles the binary. Use PuLP or or-tools to actually solve models. ↓

fix Install a modeling library like PuLP: `pip install pulp` and then set solver path to cbcbox's CBC binary.

Imports

cbcbox
```
import cbcbox
```
cbcbox is a module that provides the CBC binary path; no classes typically imported.

Quickstart

Verifies that the CBC binary shipped with cbcbox exists. Then use with PuLP or or-tools by specifying the solver path.

import cbcbox
from pathlib import Path
cbc_path = Path(cbcbox.__file__).parent / 'cbc'
print('CBC executable found at:', cbc_path.exists())