code: def sigmoid(n):
      return 1 / (1 + np.exp(-n))
  
file_path: TextAttack/textattack/shared/utils/misc.py
imports: import json
  import os
  import random
  import numpy
  import torch
  import textattack
label_desc: Use image node_id 7 for calling a global function with example usage: sigmoid(n) and returns: unknown