class_docstr: This should be a pickable class.
class_docstr_tok: ["This","should","be","a","pickable","class","."]
code: def gen_raylet_start(self, redis_address):
      def _start_raylets(iter):
          from zoo.util.utils import get_node_ip
  
          current_ip = get_node_ip()
          master_ip = redis_address.split(":")[0]
          do_start = True
          process_info = None
          base_path = tempfile.gettempdir()
          ray_master_flag_path = os.path.join(
              base_path, self.ray_master_flag
          )
          # If there is already a ray master on this node, we need to start one less raylet.
          if current_ip == master_ip:
              ray_master_lock_path = os.path.join(
                  base_path, self.ray_master_lock
              )
              with filelock.FileLock(ray_master_lock_path):
                  if not os.path.exists(ray_master_flag_path):
                      os.mknod(ray_master_flag_path)
                      do_start = False
          if do_start:
              raylet_lock_path = os.path.join(
                  base_path, self.raylet_lock
              )
              with filelock.FileLock(raylet_lock_path):
                  process_info = self._start_ray_node(
                      command=RayServiceFuncGenerator._get_raylet_command(
                          redis_address=redis_address,
                          ray_exec=self.ray_exec,
                          redis_password=self.redis_password,
                          ray_node_cpu_cores=self.ray_node_cpu_cores,
                          labels=self.labels,
                          object_store_memory=self.object_store_memory,
                          extra_params=self.extra_params,
                      ),
                      tag="raylet",
                  )
                  kill_redundant_log_monitors(
                      redis_address=redis_address
                  )
          # Cannot remove ray_master_flag at the end of this task since no barrier is guaranteed.
  
          yield process_info
  
      return _start_raylets
  
imports: import os
  import re
  import subprocess
  import time
  import uuid
  import random
  import warnings
  import tempfile
  import filelock
  import multiprocessing
  from packaging import version
  from zoo.ray.process import session_execute, ProcessMonitor
  from zoo.ray.utils import is_local
  from zoo.ray.utils import resource_to_bytes
  from zoo.ray.utils import get_parent_pid
label_desc: Use image node_id 12 for calling the RayServiceFuncGenerator obj's underlying member method code with example usage: obj.gen_raylet_start(redis_address) and returns: _start_raylets