title: TypeError: unsupported operand type(s) for +: 'int' and 'str'
body: <p>This code is for a trivia game, and every time someone gets a question right, they are awarded with a certain amount of points per question. I do not know how to get the code to add the points together after each right answer. Every time I try something different, I always get this error message.</p>
  
  <pre><code>import sys
  
  def open_file(file_name, mode):
      """Open a file."""
      try:
          the_file = open(file_name, mode)
      except IOError as e:
          print("Unable to open the file", file_name, "Ending program.\n", e)
          input("\n\nPress the enter key to exit.")
          sys.exit()
      else:
          return the_file
  
  def next_line(the_file):
      """Return next line from the trivia file, formatted."""
      line = the_file.readline()
      line = line.replace("/", "\n")
      return line
  
  def next_block(the_file):
      """Return the next block of data from the trivia file."""
      category = next_line(the_file)
  
      question = next_line(the_file)
  
      answers = []
      for i in range(4):
          answers.append(next_line(the_file))
  
      correct = next_line(the_file)
      if correct:
          correct = correct[0]
  
      explanation = next_line(the_file)
  
      points = next_line(the_file)
  
      return category, question, answers, correct, explanation, points
  
  def welcome(title):
      """Welcome the player and get his/her name."""
      print("\t\tWelcome to Trivia Challenge!\n")
      print("\t\t", title, "\n")
  
  def main():
      trivia_file = open_file("trivia_points.txt", "r")
      title = next_line(trivia_file)
      welcome(title)
      score = 0
  
      # get first block
      category, question, answers, correct, explanation, points = next_block(trivia_file)
      while category:
          # ask a question
          print(category)
          print(question)
          for i in range(4):
              print("\t", i + 1, "-", answers[i])
  
          # get answer
          answer = input("What's your answer?: ")
  
          # check answer
          if answer == correct:
              print("\nRight!", end=" ")
              total = sum(points + points)
              score = total
          else:
              print("\nWrong.", end=" ")
          print(explanation)
          print("Score:", score, "\n\n")
  
          points = int(points)
  
          # get next block
          category, question, answers, correct, explanation, points =       next_block(trivia_file)
  
      trivia_file.close()
  
      print("That was the last question!")
      print("You're final score is", score)
  
  main()  
  input("\n\nPress the enter key to exit.")
  </code></pre>