code: def test_downcasting0(self):
      code = """
          import numpy as np
          def downcasting0(n):
              data = np.zeros(n)
              data[:] = np.ones([1, n])
              return data"""
      self.run_test(code, 4, downcasting0=[int])
  
imports: import unittest
  from pythran.tests import TestEnv
  import numpy
  from pythran.typing import NDArray, List, Tuple
label_desc: Use image node_id 29 for calling the TestBroadcasting obj's underlying member method code with example usage: obj.test_downcasting0() without return types