def __call__(self, current: Solution, *args) -> Solution:
improved = self._improve(deepcopy(current), self._solution_operators)
for idx, route in enumerate(improved.routes):
improved.routes[idx] = self._improve(route, self._route_operators)
assert improved.objective() <= current.objective()
return improved
def objective(solution: Solution):
return -solution.objective()
def objective(solution: Solution) -> float:
"""
Returns solution objective.
"""
return solution.objective()