code: def relu(x):
      return np.maximum(0, x)
  
imports: from autograd import numpy
  from lifelines.datasets import load_lymph_node
  from lifelines.fitters import ParametricRegressionFitter
  from autograd.scipy.special import expit
  import pandas
  from lifelines import CoxPHFitter
  from matplotlib import pyplot
label_desc: Use image node_id 1 for calling the SplineFitter obj's underlying member method code with example usage: obj.relu(x) and returns: np