code: def test_len(self, xp, dtype):
      x = testing.shaped_arange(self.shape, xp, dtype)
      return len(x)
  
file_path: cupy/tests/cupy_tests/core_tests/test_iter.py
imports: import unittest
  import numpy
  import pytest
  import cupy
  from cupy import testing
label_desc: Use image node_id 2 for calling the TestIter obj's underlying member method code with example usage: obj.test_len(xp, dtype) and returns: len