code: def pobj_logreg(w):
      return np.sum(np.log(1 + np.exp(-y * (X @ w)))) + 1.0 / C * norm(
          w, ord=1
      )
  
file_path: celer/examples/plot_logreg_timings.py
imports: import time
  import warnings
  import numpy
  from numpy.linalg import norm
  import matplotlib.pyplot
  from sklearn import linear_model
  from libsvmdata import fetch_libsvm
  from celer import LogisticRegression
label_desc: Use image node_id 1 for calling a global function with example usage: pobj_logreg(w) and returns: unknown