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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _path_importer_cache(cls, path):
 # from importlib.PathFinder """Get the finder for the path entry from sys.path_importer_cache. If the path entry is not in the cache, find the appropriate finder and cache it. If no finder is available, store None. """

        if path == '':
            try:
                path = os.getcwd()
            except FileNotFoundError:
                # Don't cache the failure as the cwd can easily change to
                # a valid directory later on.
                return None
        try:
            finder = sys.path_importer_cache[path]
        except KeyError:
            finder = cls._path_hooks(path)
            sys.path_importer_cache[path] = finder

        return finder