new_contents: """
  >>> empty_str()
  ''
  >>> str_convert(12.2)
  '12.2'
  """
  
  import sys
  
  from numba import *
  
  @autojit(backend='ast')
  def empty_str():
      x = str()
      return x
  
  @autojit(backend='ast')
  def str_convert(x):
      return str(x)
  
  if __name__ == '__main__':
      import doctest
      doctest.testmod()
subject: Test str builtin