class_docstr: Utility class to parse a SGML file and yield documents one at a time.
code: def end_d(self):
      self.in_topic_d = 0
      self.topics.append(self.topic_d)
      self.topic_d = ""
  
imports: import itertools
  import re
  import sys
  import tarfile
  import time
  from hashlib import sha256
  from html.parser import HTMLParser
  from pathlib import Path
  from urllib.request import urlretrieve
  import matplotlib.pyplot
  import numpy
  from matplotlib import rcParams
  from sklearn.datasets import get_data_home
  from sklearn.feature_extraction.text import HashingVectorizer
  from sklearn.linear_model import PassiveAggressiveClassifier, Perceptron, SGDClassifier
  from sklearn.naive_bayes import MultinomialNB
label_desc: Use image node_id 16 for calling the ReutersParser obj's underlying member method code with example usage: obj.end_d() without return types