code: def __call__(self, data):
      if data:
          data[0] = data[0] + np.pi
      else:
          data.append(1)
      return data
  
imports: from __future__ import annotations
  import os
  import shutil
  import tempfile
  import unittest
  import numpy
  import torch.distributed
  from monai.data import PersistentDataset, json_hashing
  from monai.transforms import Transform
  from tests.utils import DistCall, DistTestCase
label_desc: Use image node_id 1 for calling the _InplaceXform obj's underlying member method code with example usage: obj.__call__(data) and returns: data