CODEWITHSUNDEEP
pythonor-tools
Manglu
Manglu

Reputation: 266

'Solver' has no attribute 'CreateSolver' in google or-tools

I am facing some issue in using google or tools.

from ortools.linear_solver import pywraplp
model = pywraplp.Solver.CreateSolver('CBC')

When I am trying to use Solver.CreateSolver('CBC'), it shows

AttributeError: type object 'Solver' has no attribute 'CreateSolver'

My installed or-tools version is 6.8.5452. Is there any way so that I can use CBC here.

Upvotes: 1

Views: 1260

Answers (2)

Stradivari
Stradivari

Reputation: 2766

The previous syntax was:

solver = pywraplp.Solver('ProblemName', pywraplp.Solver.CBC_MIXED_INTEGER_PROGRAMMING)

Ref: https://github.com/google/or-tools/blob/v6.8/examples/python/3_jugs_mip.py

Upvotes: 1

NALLAPANENIVENKATESH CHOWDARY
NALLAPANENIVENKATESH CHOWDARY

Reputation: 614

The simple thing you can do is update ortools or uninstall and install ortools again . I have installed ortools using

pip install ortools

or you can upgrade ortools using

python -m pip install --upgrade --user ortools

and then the above code worked fine you can this in the below image.

code pic

Upvotes: 0

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