code: def test_broadcasting_expr0(self):
      code = """
          import numpy as np
          def broadcasting_expr0(num_pairs):
              t = np.zeros((num_pairs, 4), dtype=float)
              t[0,1] = t[1, 0] = 1
              first_row = t[:, 0].reshape((-1, 1))
              normalized_triples = np.subtract(t, first_row)
              return normalized_triples[:,1:4]"""
      self.run_test(code, 4, broadcasting_expr0=[int])
  
imports: import unittest
  from pythran.tests import TestEnv
  import numpy
  from pythran.typing import NDArray, List, Tuple
label_desc: Use image node_id 28 for calling the TestBroadcasting obj's underlying member method code with example usage: obj.test_broadcasting_expr0() without return types