code: def _pickle_array(arr):
      arr = arr.view(np.ndarray)
  
      buf = BytesIO()
      write_array(buf, arr)
  
      return buf.getvalue()
  
file_path: catboost/contrib/python/pandas/py2/pandas/io/pickle.py
imports: import warnings
  import numpy
  from numpy.lib.format import read_array, write_array
  from pandas.compat import PY3, BytesIO, cPickle, pickle_compat
  from pandas.io.common import _get_handle, _stringify_path
label_desc: Use image node_id 3 for calling a global function with example usage: _pickle_array(arr) and returns: buf