When the user wants to build, solve, and debug mixed-integer linear programs in Python with Gurobi — creating variables, writing constraint-builder functions, setting objectives and parameters, handling solver status, and extracting solutions safely. Also use when the user mentions "gurobipy," "build a MIP model," "mixed-integer program," "addVar," "addConstr," "tupledict," or asks why reading .X fails after optimize. For products of variables, big-M choices, and piecewise-linear terms, see linearization-techniques; for callbacks, IIS deep-dives, and solution pools, see gurobi-advanced-features.
