old_contents: import random
  from urllib import urlopen
  import sys
  
  WORD_URL= "http://learncodethehardway.org/words.txt"
  WORDS = []
  
  PHRASES = {
      "class %%%(%%%):":
        "Make a class named %%% that is-a %%%.",
      "class %%%(object):\n\tdef __init__(self, ***)" :
        "class %%% has-a __init__ that takes self and *** parameters.",
      "class %%%(object):\n\tdef ***(self, @@@)":
        "class %%% has-a function named *** that takes self and @@@ parameters.",
      "*** = %%%()":
        "Set *** to an instance of class %%%.",
      "***.***(@@@)":
        "From *** get the *** function, and call it with parameters self, @@@.",
      "***.*** = '***'":
        "From *** get the *** attribute and set it to '***'."
  }
  
  # do they want to drill phrases first
  
  if len(sys.argv) == 2 and sys.argv[1] == "english":
      PHRASE_FIRST = True
  else:
      PHRASE_FIRST = False
  
  # load up the words from the website
  for word in urlopen(WORD_URL).readlines():
      WORDS.append(word.strip())
  
  def convert(snippet, phrase):
      class_names = [w.capitalize() for w in
                     random.sample(WORDS, snippet.count("%%%"))]
      other_names = random.sample(WORDS, snippet.count("***"))
      results = []
      param_names = []
  
      for i in range(0, snippet.count("@@@")):
          param_count = random.randint(1,3)
          param_names.append(', '.join(random.sample(WORDS, param_count)))
  
      for sentence in snippet, phrase:
          result = sentence[:]
  
          # fake class names
          for word in class_names:
              result = result.replace("%%%", word, 1)
  
          # fake another names
          for word in other_names:
              result = result.replace("***", word, 1)
  
          for word in param_names:
              result = result.replace("@@@", word, 1)
  
          resultsa.append(result)
  
      return results
  
  # keep going until they hit CTRL-D
  try:
      while True:
          snippets = PHRASES.keys()
          random.shuffle(snippets)
  
          for snippet in snippets:
              phrase = PHRASES[snippet]
              question, answer = convert(snippet, phrase)
              if PHRASE_FIRST:
                  question, answer = answer, question
  
              print question
  
              raw_input("> ")
              print "ANSWER: %s\n\n" % answer
  except EOFError:
      print "\nBye"
  
new_contents: import random
  from urllib import urlopen
  import sys
  
  WORD_URL= "http://learncodethehardway.org/words.txt"
  WORDS = []
  
  PHRASES = {
      "class %%%(%%%):":
        "Make a class named %%% that is-a %%%.",
      "class %%%(object):\n\tdef __init__(self, ***)" :
        "class %%% has-a __init__ that takes self and *** parameters.",
      "class %%%(object):\n\tdef ***(self, @@@)":
        "class %%% has-a function named *** that takes self and @@@ parameters.",
      "*** = %%%()":
        "Set *** to an instance of class %%%.",
      "***.***(@@@)":
        "From *** get the *** function, and call it with parameters self, @@@.",
      "***.*** = '***'":
        "From *** get the *** attribute and set it to '***'."
  }
  
  # do they want to drill phrases first
  
  if len(sys.argv) == 2 and sys.argv[1] == "english":
      PHRASE_FIRST = True
  else:
      PHRASE_FIRST = False
  
  # load up the words from the website
  for word in urlopen(WORD_URL).readlines():
      WORDS.append(word.strip())
  
  def convert(snippet, phrase):
      class_names = [w.capitalize() for w in
                     random.sample(WORDS, snippet.count("%%%"))]
      other_names = random.sample(WORDS, snippet.count("***"))
      results = []
      param_names = []
  
      for i in range(0, snippet.count("@@@")):
          param_count = random.randint(1,3)
          param_names.append(', '.join(random.sample(WORDS, param_count)))
  
      for sentence in snippet, phrase:
          result = sentence[:]
  
          # fake class names
          for word in class_names:
              result = result.replace("%%%", word, 1)
  
          # fake another names
          for word in other_names:
              result = result.replace("***", word, 1)
  
          for word in param_names:
              result = result.replace("@@@", word, 1)
  
          results.append(result)
  
      return results
  
  # keep going until they hit CTRL-D
  try:
      while True:
          snippets = PHRASES.keys()
          random.shuffle(snippets)
  
          for snippet in snippets:
              phrase = PHRASES[snippet]
              question, answer = convert(snippet, phrase)
              if PHRASE_FIRST:
                  question, answer = answer, question
  
              print question
  
              raw_input("> ")
              print "ANSWER: %s\n\n" % answer
  except EOFError:
      print "\nBye"
  
subject: Fix typo in exercise 41.