code: def format_timestamp(
      seconds: float,
      always_include_hours: bool = False,
      decimal_marker: str = ".",
  ):
      assert seconds >= 0, "non-negative timestamp expected"
      milliseconds = round(seconds * 1000.0)
  
      hours = milliseconds // 3_600_000
      milliseconds -= hours * 3_600_000
  
      minutes = milliseconds // 60_000
      milliseconds -= minutes * 60_000
  
      seconds = milliseconds // 1_000
      milliseconds -= seconds * 1_000
  
      hours_marker = (
          f"{hours:02d}:" if always_include_hours or hours > 0 else ""
      )
      return f"{hours_marker}{minutes:02d}:{seconds:02d}{decimal_marker}{milliseconds:03d}"
  
imports: import json
  import os
  import re
  import sys
  import zlib
  from typing import Callable, List, Optional, TextIO
label_desc: Use image node_id 6 for calling a global function with example usage: format_timestamp(seconds, always_include_hours, decimal_marker) and returns: hours_marker, minutes, str, seconds, decimal_marker, milliseconds