code: def fit(self, X, y=None):
      pass
  
imports: from __future__ import division
  from __future__ import print_function
  import os
  import sys
  import unittest
  import numpy
  from numpy.testing import assert_equal
  from numpy.testing import assert_raises
  from pyod.models.base import BaseDetector
  from pyod.utils.data import generate_data
label_desc: Use image node_id 3 for calling the Dummy1 obj's underlying member method code with example usage: obj.fit(X, y) without return types