code: def __eq__(self, other):
      return MockDataFrame(self.array == other.array)
  
imports: import numpy
  from ..base import BaseEstimator, ClassifierMixin
  from .testing import assert_true
  from .validation import _num_samples, check_array
label_desc: Use image node_id 4 for calling the MockDataFrame obj's underlying member method code with example usage: obj.__eq__(other) and returns: MockDataFrame