code: def get_max_path_length(top_path=None, maxl=1000):
      """Deduce the maximal length of the filename in a given path"""
      if not top_path:
          top_path = getpwd()
      import random
      from datalad import lgr
      from datalad.support import path
  
      prefix = path.join(top_path, "dl%d" % random.randint(1, 100000))
      # some smart folks could implement binary search for this
      max_path_length = None
      for i in range(maxl - len(prefix)):
          filename = prefix + "_" * i
          path_length = len(filename)
          try:
              with open(filename, "w") as f:
                  max_path_length = path_length
          except Exception as exc:
              ce = CapturedException(exc)
              lgr.debug(
                  "Failed to create sample file for length %d. Last succeeded was %s. Exception: %s",
                  path_length,
                  max_path_length,
                  ce,
              )
              break
          unlink(filename)
      return max_path_length
  
imports: import logging
  import os
  import os.path
  import sys
  import tempfile
  import textwrap
  from collections import defaultdict
  from functools import partial
  from datalad.dochelpers import get_docstring_split
  from datalad.interface.base import Interface, build_doc
  from datalad.utils import ensure_unicode, getpwd, unlink, Path
  from datalad.support.external_versions import external_versions
  from datalad.support.exceptions import CapturedException, CommandError, InvalidGitRepositoryError
  from datalad import __version__
label_desc: Use image node_id 2 for calling a global function with example usage: get_max_path_length(top_path, maxl) and returns: max_path_length