class_docstr: Class encapsulating a batch during the augmentation process.
  
  Data within the batch is already verified and normalized, similar to
  :class:`Batch`. Data within the batch may be changed in-place. No initial
  copy is needed.
  
  Added in 0.4.0.
  
  Parameters
  ----------
  images : None or (N,H,W,C) ndarray or list of (H,W,C) ndarray
      The images to augment.
  
  heatmaps : None or list of imgaug.augmentables.heatmaps.HeatmapsOnImage
      The heatmaps to augment.
  
  segmentation_maps : None or list of imgaug.augmentables.segmaps.SegmentationMapsOnImage
      The segmentation maps to augment.
  
  keypoints : None or list of imgaug.augmentables.kps.KeypointOnImage
      The keypoints to augment.
  
  bounding_boxes : None or list of imgaug.augmentables.bbs.BoundingBoxesOnImage
      The bounding boxes to augment.
  
  polygons : None or list of imgaug.augmentables.polys.PolygonsOnImage
      The polygons to augment.
  
  line_strings : None or list of imgaug.augmentables.lines.LineStringsOnImage
      The line strings to augment.
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docstr: Start a context in which propagation hooks are applied.
  
  Added in 0.4.0.
  
  Parameters
  ----------
  augmenter : imgaug.augmenters.meta.Augmenter
      Augmenter to provide to the propagation hook function.
  
  hooks : imgaug.imgaug.HooksImages or imgaug.imgaug.HooksKeypoints
      The hooks that might contain a propagation hook function.
  
  parents : list of imgaug.augmenters.meta.Augmenter
      The list of parents to provide to the propagation hook function.
  
  Returns
  -------
  _BatchInAugmentationPropagationContext
      The progagation hook context.
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code: def propagation_hooks_ctx(self, augmenter, hooks, parents):
      """Start a context in which propagation hooks are applied.
  
      Added in 0.4.0.
  
      Parameters
      ----------
      augmenter : imgaug.augmenters.meta.Augmenter
          Augmenter to provide to the propagation hook function.
  
      hooks : imgaug.imgaug.HooksImages or imgaug.imgaug.HooksKeypoints
          The hooks that might contain a propagation hook function.
  
      parents : list of imgaug.augmenters.meta.Augmenter
          The list of parents to provide to the propagation hook function.
  
      Returns
      -------
      _BatchInAugmentationPropagationContext
          The progagation hook context.
  
      """
      return _BatchInAugmentationPropagationContext(
          self, augmenter=augmenter, hooks=hooks, parents=parents
      )
  
imports: from __future__ import print_function, division, absolute_import
  import collections
  import numpy
  from ..None import imgaug
  from .None import normalization
  from .None import utils
label_desc: Use image node_id 9 for calling the _BatchInAugmentation obj's underlying member method code with example usage: obj.propagation_hooks_ctx(augmenter, hooks, parents) and returns: _BatchInAugmentationPropagationContext