code: def sample_unweighted(mat):
      """
      Candidate sampling function for use with :py:func:`neg_sample`.
      It samples items uniformly at random.
      """
      return np.random.randint(0, mat.ncols)
  
imports: import numpy
  from numba import njit
label_desc: Use image node_id 1 for calling a global function with example usage: sample_unweighted(mat) and returns: np