code: def peek(seq: Iterator[Any]) -> tuple[Optional[Any], Iterator[Any]]:
      try:
          first = next(seq)
      except TypeError as e:
          if "not an iterator" not in str(e):
              raise
          try:
              seq = iter(seq)
              first = next(seq)
          except StopIteration:
              return None, iter(seq)
      except StopIteration:
          return None, iter(seq)
  
      return first, itertools.chain([first], seq)
  
imports: from __future__ import annotations
  import collections
  import functools
  import itertools
  import multiprocessing
  import multiprocessing.dummy
  import os
  import queue
  import tempfile
  from typing import TYPE_CHECKING, overload
  import numpy
  from dedupe.backport import RLock
label_desc: Use image node_id 5 for calling a global function with example usage: peek(seq) and returns: first,  itertools, None,  iter, None,  iter