Python：从多个进程写入单个文件（ZMQ）(Python: write to single file from multiple processes (ZMQ))

 您可以将伴随对象与自定义“apply”方法一起使用： 
 
case class MyReturnedModel(reason: String)

object MyReturnedModel {
  def apply(mod: ReturnedModel) = MyReturnedModel(mod.reason.toString)
}

val data: ReturnedModel = ... // Some instance of ReturnedModel
val mr = MyReturnModel(data)
 
 请注意，case类及其伴随对象需要位于同一个文件中才能使用。 

You can use a companion object with a custom "apply" method:
 
case class MyReturnedModel(reason: String)

object MyReturnedModel {
  def apply(mod: ReturnedModel) = MyReturnedModel(mod.reason.toString)
}

val data: ReturnedModel = ... // Some instance of ReturnedModel
val mr = MyReturnModel(data)
 
Just note that the case class and its companion object need to be in the same file for this to work.