code: def versions_from_parentdir(parentdir_prefix, root, verbose):
      """Try to determine the version from the parent directory name.
  
      Source tarballs conventionally unpack into a directory that includes both
      the project name and a version string. We will also support searching up
      two directory levels for an appropriately named parent directory
      """
      rootdirs = []
  
      for _ in range(3):
          dirname = os.path.basename(root)
          if dirname.startswith(parentdir_prefix):
              return {
                  "version": dirname[len(parentdir_prefix) :],
                  "full-revisionid": None,
                  "dirty": False,
                  "error": None,
                  "date": None,
              }
          rootdirs.append(root)
          root = os.path.dirname(root)  # up a level
  
      if verbose:
          print(
              "Tried directories %s but none started with prefix %s"
              % (str(rootdirs), parentdir_prefix)
          )
      raise NotThisMethod("rootdir doesn't start with parentdir_prefix")
  
imports: import errno
  import functools
  import os
  import re
  import subprocess
  import sys
  from typing import Callable, Dict
label_desc: Use image node_id 5 for calling a global function with example usage: versions_from_parentdir(parentdir_prefix, root, verbose) and returns: dict