code: def _f_quadratic(x):
      """
      Quadratic transformation
      """
      return np.array(x) * np.array(x)
  
imports: import random
  import numpy
  import pandas
  from sklearn.datasets import make_classification
  from scipy.optimize import fsolve
  from scipy.special import expit
  from scipy.special import logit
label_desc: Use image node_id 2 for calling a global function with example usage: _f_quadratic(x) and returns: unknown