如何使用py4j将Scala HashSet转换为Python集？

import py4j.GatewayServer
import scala.collection.mutable.HashSet

class ScalaHashSetConverter {
  def convertToPythonHashSet(): HashSet[String] = {
    val scalaHashSet = new HashSet[String]()
    scalaHashSet.add("Item 1")
    scalaHashSet.add("Item 2")
    scalaHashSet.add("Item 3")
    scalaHashSet
  }
}

object ScalaHashSetConverter {
  def main(args: Array[String]): Unit = {
    val converter = new ScalaHashSetConverter()
    val server = new GatewayServer(converter)
    server.start()
  }
}

from py4j.java_gateway import JavaGateway

# 连接到Scala的GatewayServer
gateway = JavaGateway()
scala_converter = gateway.entry_point

# 调用Scala中的方法获取HashSet
scala_hashset = scala_converter.convertToPythonHashSet()

# 将Scala HashSet转换为Python集
python_set = set(scala_hashset)

# 打印结果
print(python_set)