class_docstr: ASR Task 
class_docstr_tok: ["ASR","Task"]
docstr: batch input TensorShape 
docstr_tok: ["batch","input","TensorShape"]
code: def batch_input_shape(self):
      """batch input TensorShape"""
      feature, labels = self.__getitem__(0)
  
      feature_shape, label_shape = {}, {}
      for feature_key, feature_val in feature.items():
          feature_shape[feature_key] = tf.TensorShape(
              (None,) + feature_val.shape[1:]
          )
  
      for label_key, label_val in labels.items():
          label_shape[label_key] = tf.TensorShape(
              (None,) + label_val.shape[1:]
          )
  
      return feature_shape, label_shape
  
imports: import numpy
  import delta.compat
  from absl import logging
  from delta import utils
  from delta.data.utils import espnet_utils
  from delta.utils.register import registers
  from delta.data.task.base_speech_task import SpeechTask
label_desc: Use image node_id 16 for calling the AsrSeqTask obj's underlying member method code with example usage: obj.batch_input_shape() and returns: feature_shape,  label_shape