code: def mod_sys_path(paths):
      
  
      old_path = sys.path
      sys.path = paths + sys.path
      try:
          yield
      finally:
          sys.path = old_path
docs: A context manager that will append the specified paths to Python's
      ``sys.path`` during the execution of the block.
  
      :param paths: the paths to append
      :type paths: list(str)