class_docstr: Cache to give a repository instance for any given file path
  
  Instances of _CachedRepo are created and returned based on the
  determined dataset root path of a given file path.
docstr: Return a repository instance for a given file path
  
  Parameters
  ----------
  fpath : Path
  
  Returns
  -------
  _CachedRepo or None
docstr_tok: ["Return","a","repository","instance","for","a","given","file","path","Parameters","--","--","--","--","--","fpath",":","Path","Returns","--","--","--","-","_CachedRepo","or","None"]
code: def __getitem__(self, fpath):
      """Return a repository instance for a given file path
  
      Parameters
      ----------
      fpath : Path
  
      Returns
      -------
      _CachedRepo or None
      """
      repo_root = self._dir2reporoot(fpath.parent)
  
      if repo_root is None:
          return
  
      repo = self.get(repo_root)
  
      if repo is None:
          repo = _CachedRepo(repo_root)
          self[repo_root] = repo
  
      return repo
  
imports: import logging
  import os.path
  from shutil import copyfile
  import sys
  from datalad.interface.base import Interface
  from datalad.interface.base import build_doc, eval_results
  from datalad.support.constraints import EnsureStr, EnsureNone
  from datalad.interface.common_opts import save_message_opt
  from datalad.support.param import Parameter
  from datalad.distribution.dataset import Dataset, require_dataset
  from datalad.support.annexrepo import AnnexRepo
  from datalad.support.exceptions import CapturedException
  from datalad.utils import ensure_list, get_dataset_root, Path
  from datalad.distribution.dataset import EnsureDataset, datasetmethod, resolve_path
  from functools import lru_cache
label_desc: Use image node_id 3 for calling the _StaticRepoCache obj's underlying member method code with example usage: obj.__getitem__(fpath) and returns: repo