old_contents: import sys
  from linguine.transaction_exception import TransactionException
  from linguine.ops.tfidf import Tfidf
  from linguine.ops.no_op import NoOp
  from linguine.ops.lemmatize import LemmatizeWordNet
  from linguine.ops.pos_tag import PosTag
  from linguine.ops.word_cloud_op import WordCloudOp
  from linguine.ops.remove_caps import RemoveCapsGreedy
  from linguine.ops.remove_caps import RemoveCapsPreserveNNP
  from linguine.ops.remove_punct import RemovePunct
  from linguine.ops.remove_stopwords import RemoveStopwords
  from linguine.ops.sentence_tokenize import SentenceTokenize
  from linguine.ops.stem import StemmerLancaster, StemmerPorter, StemmerSnowball
  from linguine.ops.topic_model import TopicModel
  from linguine.ops.word_tokenize import WordTokenizeTreebank, WordTokenizeWhitespacePunct, WordTokenizeStanford, WordTokenizeSpaces, WordTokenizeTabs
  
  def get_operation_handler(operation):
      if operation == 'lemmatize_wordnet':
          return LemmatizeWordNet()
      elif operation == 'pos_tag':
          return PosTag()
      elif operation == 'removecapsgreedy':
          return RemoveCapsGreedy()
      elif operation == 'removecapsnnp':
          return RemoveCapsPreserveNNP()
      elif operation == 'removepunct':
          return RemovePunct()
      elif operation == 'remove_stopwords':
      	return RemoveStopwords()
      elif operation == 'sentence_tokenize':
          return SentenceTokenize()
      elif operation == 'stem_porter':
          return StemmerPorter()
      elif operation == 'stem_lancaster':
          return StemmerLancaster()
      elif operation == 'stem_snowball':
          return StemmerSnowball()
      elif operation == 'tfidf':
          return Tfidf()
      elif operation == 'topic_model':
          return TopicModel()
      elif operation == 'wordcloudop':
          return WordCloudOp()
      elif operation == 'word_tokenize_treebank':
          return WordTokenizeTreebank()
      elif operation == 'word_tokenize_whitespace_punct':
          return WordTokenizeWhitespacePunct()
      elif operation == 'word_tokenize_stanford':
          return WordTokenizeStanford()
      elif operation == 'word_tokenize_spaces':
          return WordTokenizeSpaces()
      elif operation == 'word_tokenize_tabs':
          return WordTokenizeTabs()
      elif operation == 'noop':
      	return NoOp()
      else:
          raise TransactionException("The requested operation does not exist.")
  
new_contents: import sys
  from linguine.transaction_exception import TransactionException
  from linguine.ops.tfidf import Tfidf
  from linguine.ops.no_op import NoOp
  from linguine.ops.lemmatize import LemmatizerWordNet
  from linguine.ops.pos_tag import PosTag
  from linguine.ops.word_cloud_op import WordCloudOp
  from linguine.ops.remove_caps import RemoveCapsGreedy
  from linguine.ops.remove_caps import RemoveCapsPreserveNNP
  from linguine.ops.remove_punct import RemovePunct
  from linguine.ops.remove_stopwords import RemoveStopwords
  from linguine.ops.sentence_tokenize import SentenceTokenize
  from linguine.ops.stem import StemmerLancaster, StemmerPorter, StemmerSnowball
  from linguine.ops.topic_model import TopicModel
  from linguine.ops.word_tokenize import WordTokenizeTreebank, WordTokenizeWhitespacePunct, WordTokenizeStanford, WordTokenizeSpaces, WordTokenizeTabs
  
  def get_operation_handler(operation):
      if operation == 'lemmatize_wordnet':
          return LemmatizerWordNet()
      elif operation == 'pos_tag':
          return PosTag()
      elif operation == 'removecapsgreedy':
          return RemoveCapsGreedy()
      elif operation == 'removecapsnnp':
          return RemoveCapsPreserveNNP()
      elif operation == 'removepunct':
          return RemovePunct()
      elif operation == 'remove_stopwords':
      	return RemoveStopwords()
      elif operation == 'sentence_tokenize':
          return SentenceTokenize()
      elif operation == 'stem_porter':
          return StemmerPorter()
      elif operation == 'stem_lancaster':
          return StemmerLancaster()
      elif operation == 'stem_snowball':
          return StemmerSnowball()
      elif operation == 'tfidf':
          return Tfidf()
      elif operation == 'topic_model':
          return TopicModel()
      elif operation == 'wordcloudop':
          return WordCloudOp()
      elif operation == 'word_tokenize_treebank':
          return WordTokenizeTreebank()
      elif operation == 'word_tokenize_whitespace_punct':
          return WordTokenizeWhitespacePunct()
      elif operation == 'word_tokenize_stanford':
          return WordTokenizeStanford()
      elif operation == 'word_tokenize_spaces':
          return WordTokenizeSpaces()
      elif operation == 'word_tokenize_tabs':
          return WordTokenizeTabs()
      elif operation == 'noop':
      	return NoOp()
      else:
          raise TransactionException("The requested operation does not exist.")
  
subject: Fix typo