class_docstr: This is for testing callbacks.
class_docstr_tok: ["This","is","for","testing","callbacks","."]
code: def __init__(self):
      self.count = 0
      self.accum = None
  
file_path: catboost/contrib/python/scipy/py2/scipy/optimize/tests/test_trustregion.py
imports: from __future__ import division, print_function, absolute_import
  import numpy
  from scipy.optimize import minimize, rosen, rosen_der, rosen_hess, rosen_hess_prod
  from numpy.testing import assert_, assert_equal, assert_allclose
label_desc: Use image node_id 1 to create a new Accumulator object  with example: obj = Accumulator()