class_docstr: This will preoritically query data from cache-service
class_docstr_tok: ["This","will","preoritically","query","data","from","cache-service"]
code: def __iter__(self):
      return self
  
file_path: singa/examples/model_selection/TRAILS-Database-Native-Model-Selection/internal/ml/model_selection/src/dataset_utils/stream_dataloader.py
imports: import queue
  import threading
  import requests
  import time
  from src.logger import logger
label_desc: Use image node_id 3 for calling the StreamingDataLoader obj's underlying member method code with example usage: obj.__iter__() and returns: self