code: def find_dataset(h5o, path=None):
      
      # find dataset
      if isinstance(h5o, h5py.Dataset):
          return h5o
      elif path is None and len(h5o) == 1:
          path = list(h5o.keys())[0]
      elif path is None:
          raise ValueError("Please specify the HDF5 path via the "
                           "``path=`` keyword argument")
      return h5o[path]
docs: Find and return the relevant dataset inside the given H5 object
  
      If ``path=None`` is given, and ``h5o`` contains a single dataset, that
      will be returned
  
      Parameters
      ----------
      h5o : `h5py.File`, `h5py.Group`
          the HDF5 object in which to search
  
      path : `str`, optional
          the path (relative to ``h5o``) of the desired data set
  
      Returns
      -------
      dset : `h5py.Dataset`
          the recovered dataset object
  
      Raises
      ------
      ValueError
          if ``path=None`` and the HDF5 object contains multiple datasets
      KeyError
          if ``path`` is given but is not found within the HDF5 object