docstr: function to find active (not marked as finished) iterations 
  
  Returns
  -------
          list: all active iteration objects (empty if there are none)
docstr_tok: ["function","to","find","active","(","not","marked","as","finished",")","iterations","Returns","--","--","--","-","list",":","all","active","iteration","objects","(","empty","if","there","are","none",")"]
code: def active_iterations(self):
      """
      function to find active (not marked as finished) iterations
  
      Returns
      -------
              list: all active iteration objects (empty if there are none)
      """
  
      l = list(
          filter(
              lambda idx: not self.iterations[idx].is_finished,
              range(len(self.iterations)),
          )
      )
      return l
  
imports: import os
  import threading
  import time
  import math
  import pdb
  import copy
  import logging
  import numpy
  from hpbandster.core.dispatcher import Dispatcher
  from hpbandster.core.result import Result
  from hpbandster.core.base_iteration import WarmStartIteration
label_desc: Use image node_id 10 for calling the Master obj's underlying member method code with example usage: obj.active_iterations() and returns: l