Allow usage of MPSolver.SetStartingLPBasis in Python API #4188
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Signed-off-by: Peter Mitri <peter.mitri@rte-france.com>
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This PR allows using the MPSolver::SetStartingLPBasis in Python, via the Swig interface.
The trap is that Python converts the MPSolver::BasisStatus enums to integers (for example, MPVariable::basis_status returns an 'int' in Python, see new test file).
So we have to define a custom function that converts back integers to MPSolver::BasisStatus.