code: def norm(x):
      return np.sqrt(np.sum(x**2))
  
file_path: dgl/examples/pytorch/graphsim/n_body_sim.py
imports: from __future__ import absolute_import, division, print_function
  import argparse
  import os
  from math import cos, pi, radians, sin
  import numpy
label_desc: Use image node_id 2 for calling a global function with example usage: norm(x) and returns: np