code: def test_broadcast_sum_axis(self):
      code = """
              import numpy as np
              def broadcast_sum_axis(forecasted_array, observed_array):
                  return np.abs(forecasted_array[:, None] - observed_array).sum()
              """
      self.run_test(
          code,
          np.arange(100.0),
          np.arange(100.0),
          broadcast_sum_axis=[NDArray[float, :], NDArray[float, :]],
      )
  
imports: import unittest
  from pythran.tests import TestEnv
  import numpy
  from pythran.typing import NDArray, List, Tuple
label_desc: Use image node_id 26 for calling the TestBroadcasting obj's underlying member method code with example usage: obj.test_broadcast_sum_axis() without return types