code: def elements_are_numbers(array):
      
  
      # empty case
      if len(array) == 0: return 0
  
      output_value = 1
      for x in array:
  
          # test it and die if it's not a number
          test = is_a_number(x)
          if not test: return False
  
          # mention if it's complex
          output_value = max(output_value,test)
      
      return output_value
docs: Tests whether the elements of the supplied array are numbers.