Native Python interface for Coin-or Branch and Cut Solver (Cbc).
This project provide the build mechanism to automatically generate the wrapper code between Cbc C++ code and Python using SWIG.
This project was develop as part of the CBC Coin-or Sprint Aug 2019.
Binaries for the following platform are pre-compiled and available on pypi.
- linux x86_64 / python 2.7
- linux x86_64 / python 3.5
- linux x86_64 / python 3.6
- linux x86_64 / python 3.7
- win x86 / python 2.7
- win x86 / python 3.5
- win x86 / python 3.6
- win x86 / python 3.7
- win x86_64 / python 3.5
- win x86_64 / python 3.6
- win x86_64 / python 3.7
Linux x86 is not supported.
Pre-compiled python packages are deployed to cbcpy Pypi repositories.
cbcpy you should make use of
pip command line:
pip install cbcpy
The packages include pre-compiled version of Cbc.
For Windows: You must install Visual C++ Redistributable for VS2015
Here a minimalistic python script making use of
You may download
p0033.mps from here.
import cbcpy as cbc solver1 = cbc.OsiClpSolverInterface() solver1.readMps("p0033.mps") model = cbc.CbcModel(solver1) model.branchAndBound() numberColumns = model.solver().getNumCols() p_solution = model.solver().getColSolution() solution = cbc.doubleArray_frompointer(p_solution) for i in range(numberColumns): value = solution[i] print("%s has value %s" % (i, value))
Original documentation from Cbc project is available in python using the
# python Python 2.7.16 (default, Jul 13 2019, 16:01:51) [GCC 8.3.0] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import cbcpy >>> help(cbcpy) Help on module cbcpy:
The specified module could not be found.
>>> import cbcpy Traceback (most recent call last): File "<stdin>", line 1, in <module> File "C:\Python37-32\lib\site-packages\cbcpy.py", line 15, in <module> import _cbcpy ImportError: DLL load failed: The specified module could not be found.
This error might occur on Windows platform when the file
be found. You must install Visual C++ Redistributable for VS2015.
For 32-bit download "vc_redist.x86.exe" file and for 64-bit download "vc_redist.x64.exe" file.
To get community help for cbcpy, you may send email to the Cbc mailing list.
You may also get paid support by contacting Patrik Dufresne Service Logiciel.