Pyomo v6.7.2 regression: Gurobi Python interface not found

[brynpickering]

What happened?

Seen in #551 CI tests, some of the changes in Pyomo v6.7.2 have caused an issue with using solver_io=python with gurobi. Easiest fix for now is to pin Pyomo to <v6.7.2.

Which operating systems have you used?

• macOS
• Windows
• Linux

Version

v0.7.0-dev4

Relevant log output

[gw1] linux -- Python 3.10.14 /home/runner/micromamba/envs/calliope-ubuntu-latest-310-25fc8eb0047f7544a957ed75a82f2329ea5bc9f33ae1c087115cbb13d6ef0f33/bin/python3.10

self = <tests.test_backend_pyomo.TestLogging object at 0x7fc2dd24cbb0>
caplog = <_pytest.logging.LogCaptureFixture object at 0x7fc2dae78910>
gurobi_model = <calliope.model.Model object at 0x7fc2dc0c1990>

    def test_no_duplicate_log_message(self, caplog, gurobi_model):
        caplog.set_level(logging.DEBUG)
>       gurobi_model.solve()

tests/test_backend_pyomo.py:1689: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
src/calliope/model.py:470: in solve
    results = self.backend._solve(warmstart=warmstart, **solver_config)
src/calliope/backend/pyomo_backend_model.py:322: in _solve
    results = opt.solve(self._instance, tee=True, **solve_kwargs)
../../../micromamba/envs/calliope-ubuntu-latest-310-25fc8eb0047f7544a957ed75a82f2329ea5bc9f33ae1c087115cbb13d6ef0f33/lib/python3.10/site-packages/pyomo/solvers/plugins/solvers/direct_solver.py:75: in solve
    self.available(exception_flag=True)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <pyomo.solvers.plugins.solvers.gurobi_direct.GurobiDirect object at 0x7fc2da95a9e0>
exception_flag = True

    def available(self, exception_flag=True):
        """Returns True if the solver is available.
    
        :param exception_flag: If True, raise an exception instead of returning
            False if the solver is unavailable (defaults to False)
        :type exception_flag: bool
    
        In general, ``available()`` does not need to be called by the user, as
        the check is run automatically when solving a model. However it is useful
        for a simple retry loop when using a shared Gurobi license::
    
            with SolverFactory('gurobi', solver_io='python') as opt:
                while not available(exception_flag=False):
                    time.sleep(1)
                opt.solve(model)
    
        """
        # First check gurobipy is imported
        if not gurobipy_available:
            if exception_flag:
                gurobipy.log_import_warning(logger=__name__)
>               raise ApplicationError(
                    "No Python bindings available for %s solver plugin" % (type(self),)
                )
E               pyomo.common.errors.ApplicationError: No Python bindings available for <class 'pyomo.solvers.plugins.solvers.gurobi_direct.GurobiDirect'> solver plugin

../../../micromamba/envs/calliope-ubuntu-latest-310-25fc8eb0047f7544a957ed75a82f2329ea5bc9f33ae1c087115cbb13d6ef0f33/lib/python3.10/site-packages/pyomo/solvers/plugins/solvers/gurobi_direct.py:215: ApplicationError