class_docstr: Reads a dataset from a Petastorm dataset.
  
  :ivar last_row_consumed: True if the last row was already returned by the Reader.
class_docstr_tok: ["Reads","a","dataset","from","a","Petastorm","dataset",".",":","ivar","last_row_consumed",":","True","if","the","last","row","was","already","returned","by","the","Reader","."]
docstr: Stops all worker threads/processes.
docstr_tok: ["Stops","all","worker","threads\/processes","."]
code: def stop(self):
      """Stops all worker threads/processes."""
      self._workers_pool.stop()
      self.stopped = True
  
imports: import collections.abc
  import logging
  import warnings
  import six
  from pyarrow import parquet
  from petastorm.arrow_reader_worker import ArrowReaderWorker
  from petastorm.cache import NullCache
  from petastorm.errors import NoDataAvailableError
  from petastorm.etl import dataset_metadata, rowgroup_indexing
  from petastorm.etl.dataset_metadata import PetastormMetadataError, infer_or_load_unischema
  from petastorm.fs_utils import get_filesystem_and_path_or_paths, normalize_dir_url
  from petastorm.local_disk_cache import LocalDiskCache
  from petastorm.ngram import NGram
  from petastorm.predicates import PredicateBase
  from petastorm.py_dict_reader_worker import PyDictReaderWorker
  from petastorm.reader_impl.arrow_table_serializer import ArrowTableSerializer
  from petastorm.reader_impl.pickle_serializer import PickleSerializer
  from petastorm.selectors import RowGroupSelectorBase
  from petastorm.transform import transform_schema
  from petastorm.workers_pool.dummy_pool import DummyPool
  from petastorm.workers_pool.process_pool import ProcessPool
  from petastorm.workers_pool.thread_pool import ThreadPool
  from petastorm.workers_pool.ventilator import ConcurrentVentilator
label_desc: Use image node_id 10 for calling the Reader obj's underlying member method code with example usage: obj.stop() without return types