code: def _format_bytes(n):
      # TODO: just import from distributed if / when required
      """Format bytes as text
  
      >>> format_bytes(1)
      '1 B'
      >>> format_bytes(1234)
      '1.23 kB'
      >>> format_bytes(12345678)
      '12.35 MB'
      >>> format_bytes(1234567890)
      '1.23 GB'
      """
      if n > 1e9:
          return "%0.2f GB" % (n / 1e9)
      if n > 1e6:
          return "%0.2f MB" % (n / 1e6)
      if n > 1e3:
          return "%0.2f kB" % (n / 1000)
      return "%d B" % n
  
imports: import contextlib
  import datetime
  import functools
  import logging
  import warnings
  from collections.abc import Sequence
  from multiprocessing import cpu_count
  from numbers import Integral
  from timeit import default_timer
  import dask
  import dask.array
  import dask.dataframe
  import numpy
  import pandas
  import sklearn.utils.extmath
  import sklearn.utils.validation
  from dask import delayed
  from dask.array.utils import assert_eq
  from dask.dataframe.utils import assert_eq
  from ._utils import ConstantFunction
label_desc: Use image node_id 17 for calling a global function with example usage: _format_bytes(n) and returns: unknown, unknown, unknown, unknown