code: def __getitem__(self, i):
      return self._obj[2 * i - 1]
  
file_path: cudf/python/cudf/cudf/tests/test_custom_accessor.py
imports: import pandas
  import pytest
  import cudf
  from cudf.testing._utils import assert_eq
label_desc: Use image node_id 2 for calling the OddRowAccessor obj's underlying member method code with example usage: obj.__getitem__(i) and returns: self