code: def fit(self, X, y):
      return self
  
imports: import os
  from ast import literal_eval
  import numpy
  from distributed import Lock, Variable, get_worker
  from sklearn.base import BaseEstimator, ClassifierMixin
  from sklearn.utils.validation import _num_samples, check_array
label_desc: Use image node_id 2 for calling the _MaybeLinearFunction obj's underlying member method code with example usage: obj.fit(X, y) and returns: self