code: def print_args(output=sys.stdout):
      
      def decorator(func):
          """The decorator function.
          """
          @wraps(func)
          def _(*args, **kwargs):
              """The decorated function.
              """
              output.write(
                  "Args: {0}, KwArgs: {1}\n".format(str(args), str(kwargs)))
              return func(*args, **kwargs)
          return _
      return decorator
docs: Decorate a function so that print arguments before calling it.
  
      Args:
        output: writable to print args. (Default: sys.stdout)