class_docstr: Serializer for HDF5 format.
  
  This is the standard serializer in Chainer. The chain hierarchy is simply
  mapped to HDF5 hierarchical groups.
  
  Args:
      group (h5py.Group): The group that this serializer represents.
      compression (int): Gzip compression level.
code: def __init__(self, group, compression=4):
      _check_available()
  
      self.group = group
      self.compression = compression
  
imports: import sys
  import numpy
  import six
  from chainer.backends import _chainerx
  from chainer.backends import _cpu
  from chainer.backends import cuda
  from chainer.backends import intel64
  from chainer import serializer
  import chainerx
label_desc: Use image node_id 1 to create a new HDF5Serializer object from inherited base classes: serializer with example: obj = HDF5Serializer(group, compression)