code: def normalize_file(file, separators=None):
      """
      Normalizes the file path to use the POSIX path separator (i.e., ``'/'``).
  
      *file* (:class:`str` or :class:`pathlib.PurePath`) is the file path.
  
      *separators* (:class:`~collections.abc.Collection` of :class:`str`; or
      :data:`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 :data:`None` for
      :data:`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(file)
  
      for sep in separators:
          norm_file = norm_file.replace(sep, posixpath.sep)
  
      # Remove current directory prefix.
      if norm_file.startswith("./"):
          norm_file = norm_file[2:]
  
      return norm_file
  
imports: import os
  import os.path
  import posixpath
  import stat
  from .compat import Collection, Iterable, string_types, unicode
label_desc: Use image node_id 10 for calling a global function with example usage: normalize_file(file, separators) and returns: norm_file