docs: def _create_h5_file_old(in_paths, new_path):
      """
      Function to create a new .h5 file that contains the copy of the contents of the input file(s).
  
      in_paths : str or list
          If the input is a string, it is assumed that the two signals are in the same file, else, if the input is a list,
          it is assumed that the two signals are in different file (the list should contain the paths to the two files).
      new_path : str
          The path to create the new file. (default: 'sync_file.h5')
  
      Returns
      -------
      new_file : h5py Object
          Object of the h5py package containing the new file containing the copy of the contents of the input file(s).
      """
      if type(in_paths) == str:
          in_paths = [in_paths]
      new_file = File(new_path, 'w')
      for in_path in in_paths:
          with File(in_path) as file:
              for attribute in (list(file.attrs.items())):
                  new_file.attrs.__setitem__(name=attribute[0], value=attribute[1])
              for key in list(file.keys()):
                  new_file.create_group(key)
                  for attribute in list(file[key].attrs.items()):
                      new_file[key].attrs.__setitem__(name=attribute[0], value=attribute[1])
                  for other_key in list(file[key].keys()):
                      new_file.create_group(key + '/' + other_key)
                      for attribute in list(file[key + '/' + other_key].attrs.items()):
                          new_file[key + '/' + other_key].attrs.__setitem__(name=attribute[0], value=attribute[1])
                      for another_key in list(file[key][other_key]):
                          try:
                              for yet_another_key in list(file[key][other_key][another_key].keys()):
                                  try:
                                      for y in list(file[key][other_key][another_key][yet_another_key].keys()):
                                          new_file.create_dataset(name=key + '/' + other_key + '/' + another_key + '/'
                                                                       + yet_another_key + '/' + y,
                                                                  data=file[key][other_key][another_key][yet_another_key][
                                                                      y])
                                          for attribute in list(
                                                  file[key][other_key][another_key][yet_another_key].attrs.items()):
                                              new_file[key + '/' + other_key + '/' + another_key + '/'
                                                       + yet_another_key + '/' + y].attrs.__setitem__(
                                                  name=attribute[0],
                                                  value=attribute[1])
                                  except:
                                      new_file.create_dataset(
                                          name=key + '/' + other_key + '/' + another_key + '/' + yet_another_key,
                                          data=file[key][other_key][another_key][yet_another_key])
                                      for attribute in list(
                                              file[
                                                  key + '/' + other_key + '/' + another_key + '/' + yet_another_key].attrs.items()):
                                          new_file[
                                              key + '/' + other_key + '/' + another_key + '/' + yet_another_key].attrs.__setitem__(
                                              name=attribute[0],
                                              value=attribute[1])
                          except:
                              new_file.create_dataset(name=key + '/' + other_key + '/' + another_key,
                                                      data=list(file[key][other_key][another_key]))
                              for attribute in list(file[key + '/' + other_key + '/' + another_key].attrs.items()):
                                  new_file[key + '/' + other_key + '/' + another_key].attrs.__setitem__(name=attribute[0],
                                                                                                        value=attribute[
                                                                                                            1])
  
      return new_file