code: def test_at(arr):
      from pybind11_tests.array import at_t, mutate_at_t
  
      assert at_t(arr, 0, 2) == 3
      assert at_t(arr, 1, 0) == 4
  
      assert all(mutate_at_t(arr, 0, 2).ravel() == [1, 2, 4, 4, 5, 6])
      assert all(mutate_at_t(arr, 1, 0).ravel() == [1, 2, 4, 5, 5, 6])
  
file_path: turicreate/src/external/coremltools_wrap/coremltools/deps/pybind11/tests/test_numpy_array.py
imports: import pytest
label_desc: Use image node_id 8 for calling a global function with example usage: test_at(arr) without return types