code: def normalize_file(
      file: StrPath,
      separators: Optional[Collection[str]] = None,
  ) -> str:
      """
      Normalizes the file path to use the POSIX path separator (i.e.,
      ``"/"``), and make the paths relative (remove leading ``"/"``).
  
      *file* (:class:`str` or :class:`os.PathLike`) is the file path.
  
      *separators* (:class:`~collections.abc.Collection` of :class:`str`; or
      ``None``) optionally contains the path separators to normalize.
      This does not need to include the POSIX path separator (``"/"``),
      but including it will not affect the results. Default is ``None``
      for ``NORMALIZE_PATH_SEPS``. To prevent normalization, pass an
      empty container (e.g., an empty tuple ``()``).
  
      Returns the normalized file path (:class:`str`).
      """
      # Normalize path separators.
      if separators is None:
          separators = NORMALIZE_PATH_SEPS
  
      # Convert path object to string.
      norm_file: str = os.fspath(file)
  
      for sep in separators:
          norm_file = norm_file.replace(sep, posixpath.sep)
  
      if norm_file.startswith("/"):
          # Make path relative.
          norm_file = norm_file[1:]
  
      elif norm_file.startswith("./"):
          # Remove current directory prefix.
          norm_file = norm_file[2:]
  
      return norm_file
  
imports: import os
  import os.path
  import pathlib
  import posixpath
  import stat
  import sys
  import warnings
  from collections.abc import Collection, Iterable
  from dataclasses import dataclass
  from os import PathLike
  from typing import Any, AnyStr, Callable, Collection, Dict, Generic, Iterable, Iterator, List, Optional, Sequence, Set, Tuple, TypeVar, Union
  from .pattern import Pattern
label_desc: Use image node_id 13 for calling a global function with example usage: normalize_file(file, separators) and returns: norm_file