code: def _pretty_format_positional(
      positional: t.Optional["tf_ext.TensorSignature"],
  ) -> str:
      if positional is not None:
          return f'Positional arguments ({len(positional)} total):\n    {"    * ".join(str(a) for a in positional)}'  # noqa
      return "No positional arguments.\n"
  
imports: from __future__ import annotations
  import importlib.metadata
  import importlib.util
  import logging
  import typing
  from typing import TYPE_CHECKING
  from bentoml.exceptions import BentoMLException
  from ...types import LazyType
  from ...utils.lazy_loader import LazyLoader
label_desc: Use image node_id 15 for calling a global function with example usage: _pretty_format_positional(positional) and returns: str, str, len, str, str