code: def test_bandwidth_non2d_input(self, dtype):
      A = np.array([1, 2, 3], dtype=dtype)
      raises(linalg.LinAlgError, bandwidth, A)
      A = np.array([[[1, 2, 3], [4, 5, 6]]], dtype=dtype)
      raises(linalg.LinAlgError, bandwidth, A)
  
file_path: cupy/tests/cupyx_tests/scipy_tests/linalg_tests/test_array_utils.py
imports: import numpy
  from numpy import linalg
  from cupyx.scipy.linalg import bandwidth
  from pytest import raises
  from cupy import testing
label_desc: Use image node_id 1 for calling the TestBadwidth obj's underlying member method code with example usage: obj.test_bandwidth_non2d_input(dtype) without return types