关于Python版本是否支持strengthWeightFactoryClass规划变量配置的问询

在OptaPlanner的Python版本中，完全支持Java版本里@PlanningVariable(strengthWeightFactoryClass = ...)对应的变量强度权重工厂功能，通过@planning_variable装饰器的strength_weight_factory参数来配置。

Python示例（项目作业调度问题） #

首先定义强度权重工厂类，需要实现StrengthWeightFactory接口：

from optapy import PlanningVariableStrengthWeightFactory

class ExecutionModeStrengthWeightFactory(PlanningVariableStrengthWeightFactory):
    def create_strength_weight(self, solution, entity):
        # 根据业务逻辑计算并返回ExecutionMode的强度权重值
        # 示例：假设ExecutionMode有priority属性，权重取其优先级值
        return entity.execution_mode.priority

然后在规划实体的变量上配置该工厂：

from optapy import planning_entity, planning_variable

@planning_entity
class Task:
    def __init__(self, execution_mode=None):
        self.execution_mode = execution_mode

    @planning_variable(
        value_range_provider_refs=["execution_mode_range"],
        strength_weight_factory=ExecutionModeStrengthWeightFactory()
    )
    def get_execution_mode(self):
        return self.execution_mode

    def set_execution_mode(self, execution_mode):
        self.execution_mode = execution_mode

对应的Java示例 #

@PlanningVariable(strengthWeightFactoryClass = ExecutionModeStrengthWeightFactory.class)
public ExecutionMode getExecutionMode() {
    return executionMode;
}

内容的提问来源于stack exchange，提问作者Eason Con