code: def test_c_():
      a = np.c_[np.array([[1, 2, 3]]), 0, 0, np.array([[4, 5, 6]])]
      assert_equal(a, [[1, 2, 3, 0, 0, 4, 5, 6]])
  
imports: import pytest
  import numpy
  from numpy.testing import assert_, assert_equal, assert_array_equal, assert_almost_equal, assert_array_almost_equal, assert_raises, assert_raises_regex
  from numpy.lib.index_tricks import mgrid, ogrid, ndenumerate, fill_diagonal, diag_indices, diag_indices_from, index_exp, ndindex, r_, s_, ix_
label_desc: Use image node_id 1 for calling a global function with example usage: test_c_() without return types