text: 
  from reader import PickledCorpusReader
  
  reader = PickledCorpusReader('../corpus')
  
  for category in reader.categories():
  
      n_docs = len(reader.fileids(categories=[category]))
      n_words = sum(1 for word in reader.words(categories=[category]))
  
      print("- '{}' contains {:,} docs and {:,} words".format(category, n_docs, n_words))
  