class_docstr: Generic sentinel class for testing side-effectful code in Python 2 and
  3.
class_docstr_tok: ["Generic","sentinel","class","for","testing","side-effectful","code","in","Python","2","and","3","."]
code: def set(self, new_value):
      self.value = new_value
  
imports: from datetime import datetime
  import numpy
  import pandas
  import pyarrow
  from pytest import fixture
  from random import random, randint, choice
  from faker import Faker
label_desc: Use image node_id 3 for calling the Sentinel obj's underlying member method code with example usage: obj.set(new_value) without return types