code: def get_num_partitions(self) -> int:
      return self.rdd.getNumPartitions()
  
file_path: BigDL/python/orca/src/bigdl/orca/data/tf/tf1_data.py
imports: from bigdl.dllib.utils.common import get_node_and_core_number
  from bigdl.dllib.utils.file_utils import callZooFunc
  from bigdl.dllib.feature.common import FeatureSet
  from bigdl.orca.tfpark import TFDataset
  from bigdl.dllib.utils.log4Error import invalidInputError
  from typing import TYPE_CHECKING, Optional, Any
  import logging
label_desc: Use image node_id 6 for calling the TF1Dataset obj's underlying member method code with example usage: obj.get_num_partitions() and returns: self