text: import os
  import sys
  
  
  def colorize(sheet_content):
      """ Colorizes cheatsheet content if so configured """
  
      # only colorize if so configured
      if not 'CHEATCOLORS' in os.environ:
          return sheet_content
  
      try:
          from pygments import highlight
          from pygments.lexers import BashLexer
          from pygments.formatters import TerminalFormatter
  
      # if pygments can't load, just return the uncolorized text
      except ImportError:
          return sheet_content
  
      return highlight(sheet_content, BashLexer(), TerminalFormatter())
  
  
  def die(message):
      """ Prints a message to stderr and then terminates """
      warn(message)
      exit(1)
  
  
  def editor():
      """ Determines the user's preferred editor """
      if 'EDITOR' not in os.environ:
          die(
              'In order to create/edit a cheatsheet you must set your EDITOR '
              'environment variable to your editor\'s path.'
          )
  
      elif os.environ['EDITOR'] == "":
          die(
            'Your EDITOR environment variable is set to an empty string. It must '
            'be set to your editor\'s path.'
          )
  
      else:
          return os.environ['EDITOR']
  
  
  def prompt_yes_or_no(question):
      """ Prompts the user with a yes-or-no question """
      print(question)
      return raw_input('[y/n] ') == 'y'
  
  
  def warn(message):
      """ Prints a message to stderr """
      print >> sys.stderr, (message)
  