class_docstr: Load beat times from file or handle.
class_docstr_tok: ["Load","beat","times","from","file","or","handle","."]
docstr: Load the beats in bulk-mode (i.e. all at once) from the input stream
  or file.
  
  Returns
  -------
  beats : numpy array
      Beat positions [seconds].
code: def process_single(self):
      """
      Load the beats in bulk-mode (i.e. all at once) from the input stream
      or file.
  
      Returns
      -------
      beats : numpy array
          Beat positions [seconds].
  
      """
      # pylint: disable=unused-argument
      from ..io import load_events
  
      return load_events(self.beats)
  
imports: from __future__ import absolute_import, division, print_function
  import sys
  import warnings
  import numpy
  from .beats import threshold_activations
  from .beats_hmm import BarStateSpace, BarTransitionModel, GMMPatternTrackingObservationModel, MultiPatternStateSpace, MultiPatternTransitionModel, RNNBeatTrackingObservationModel, RNNDownBeatTrackingObservationModel
  from ..ml.hmm import HiddenMarkovModel
  from ..processors import ParallelProcessor, Processor, SequentialProcessor
  from ..utils import string_types
label_desc: Use image node_id 3 for calling the LoadBeatsProcessor obj's underlying member method code with example usage: obj.process_single() and returns: load_events