class_docstr: Base class for nearest neighbors estimators.
code: def __init__(self):
      pass
  
imports: import warnings
  from abc import ABCMeta, abstractmethod
  import numpy
  from scipy.sparse import csr_matrix, issparse
  from .ball_tree import BallTree
  from .kd_tree import KDTree
  from ..base import BaseEstimator
  from ..metrics import pairwise_distances
  from ..metrics.pairwise import PAIRWISE_DISTANCE_FUNCTIONS
  from ..utils import check_X_y, check_array, _get_n_jobs, gen_even_slices
  from ..utils.fixes import argpartition
  from ..utils.multiclass import check_classification_targets
  from ..externals import six
  from ..externals.joblib import Parallel, delayed
  from ..exceptions import NotFittedError
  from ..exceptions import DataConversionWarning
label_desc: Use image node_id 1 to create a new NeighborsBase object from inherited base classes:  with example: obj = NeighborsBase()