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pythonpyomo

Don't understand why I get an "Expected an indented block" error with Pyomo

I would like to use the following code from Pyomo Accessing solver status and termination conditions

results = opt.solve(instance) # Solving a model instance  
instance.load(results) # Loading solution into results object

if (results.solver.status == SolverStatus.ok) and (results.solver.termination_condition == TerminationCondition.optimal):
    # Do something when the solution in optimal and feasible
elif (results.solver.termination_condition == TerminationCondition.infeasible):
    # Do something when model in infeasible
else:
    # Something else is wrong
    print “Solver Status: ”,  result.solver.status

Hoever, I get an error saying Expected an indented block at the elif. When inserting an indented block, I get the error Invalid syntax. I posted a screenshot of both cases. I do not understand why I get this error? I just copied and pasted the code from the official pyomo website. Do you have any idea why I am getting this error and how I can get rid of it?

enter image description here

Solution

  • You likely need to have at least 1 line of executable code within each if or elif block. Right now, you just have a comment line.

    While you are "shelling out" the program, just put the command pass in each block and see if that helps. So:

    if (something >= something_else):
    # do something
    pass
else:
    # do the other thing
    pass
....