code: def _assign_block(fs, path_or_fob, local_buffer, offset, nbytes):
      if fs is None:
          # We have an open fsspec file object
          path_or_fob.seek(offset)
          local_buffer[offset : offset + nbytes] = np.frombuffer(
              path_or_fob.read(nbytes),
              dtype="b",
          )
      else:
          # We have an fsspec filesystem and a path
          with fs.open(
              path_or_fob, mode="rb", cache_type="none"
          ) as fob:
              fob.seek(offset)
              local_buffer[offset : offset + nbytes] = np.frombuffer(
                  fob.read(nbytes),
                  dtype="b",
              )
  
imports: import datetime
  import os
  import urllib
  import warnings
  from io import BufferedWriter, BytesIO, IOBase, TextIOWrapper
  from threading import Thread
  import fsspec
  import fsspec.implementations.local
  import numpy
  import pandas
  from fsspec.core import get_fs_token_paths
  from pyarrow import PythonFile
  from pyarrow.lib import NativeFile
  from cudf.utils.docutils import docfmt_partial
label_desc: Use image node_id 23 for calling a global function with example usage: _assign_block(fs, path_or_fob, local_buffer, offset, nbytes) without return types