new_contents: __all__ = ['identity', 'print_generated_sequence']
  
  
  def identity(x):
      """
      Helper function which returns its argument unchanged.
      That is, `identity(x)` returns `x` for any input `x`.
      """
      return x
  
  
  def print_generated_sequence(gen, num, *, sep=", ", seed=None):
      """
      Helper function which prints a sequence of `num` items
      produced by the random generator `gen`.
      """
      if seed:
         gen.reset(seed)
  
      elems = [str(next(gen)) for _ in range(num)]
      sep_initial = "\n\n" if sep == "\n" else " "
      print("Generated sequence:{}{}".format(sep_initial, sep.join(elems)))
subject: Add a couple of helper functions in separate utils module