class_docstr: Test the quality of DBSCAN clustering.
class_docstr_tok: ["Test","the","quality","of","DBSCAN","clustering","."]
code: def setUpClass(self):
      np.random.seed(37)
      self.n = 30
      self.sf = tc.SFrame(np.random.rand(self.n, 2))
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import copy
  import numpy
  import unittest
  import turicreate
  from .None import util
  from turicreate.util import _assert_sframe_equal
  from turicreate.toolkits._main import ToolkitError
  from .test_knn_classifier import make_classifier_data
  import sys
  import os
label_desc: Use image node_id 1 for calling the ResultsTest obj's underlying member method code with example usage: obj.setUpClass() without return types