code: def cross_prod_matrix(v):
      return np.array(
          ((0.0, -v[2], v[1]), (v[2], 0.0, -v[0]), (-v[1], v[0], 0.0))
      )
  
imports: import numpy
label_desc: Use image node_id 1 for calling a global function with example usage: cross_prod_matrix(v) and returns: np