old_contents: def doi():
      yield '10.1371/journal.pone.0035089'
  
  def wellcome_ncbi_sim_result():
      import get_wellcome_ncbi_objects as t
      data = t.OAGPrep()
  
      for i in range(0, 75000):
          data.add(doi().next())
  
      t.to_file('test_data.txt', data)
  
  def main(argv=None):
      if not argv:
          import sys
          argv = sys.argv
  
      wellcome_ncbi_sim_result()
  
  if __name__ == '__main__':
      main()
  
new_contents: def doi():
      yield '10.1371/journal.pone.0035089'
  
  def wellcome_ncbi_sim_result():
      import get_wellcome_ncbi_objects as t
      data = t.OAGPrep('test_data.txt')
  
      for i in range(0, 75000):
          data.add(doi().next())
  
  def main(argv=None):
      if not argv:
          import sys
          argv = sys.argv
  
      wellcome_ncbi_sim_result()
  
  if __name__ == '__main__':
      main()
  
subject: fix test data generator