code: def indent(s, N=4):
      """indent a string"""
      return s.replace("\n", "\n" + N * " ")
  
imports: import sys
  import os
  import glob
  import token
  import tokenize
  import shutil
  import json
  import matplotlib
  import mpld3
  from matplotlib import image
  from matplotlib.figure import Figure
label_desc: Use image node_id 2 for calling a global function with example usage: indent(s, N) and returns: s