docs: def queryize(terms, exclude_screen_name=None):
      '''
      Create query from list of terms, using OR
      but intelligently excluding terms beginning with '-' (Twitter's NOT operator).
      Optionally add -from:exclude_screen_name.
  
      >>> helpers.queryize(['apple', 'orange', '-peach'])
      u'apple OR orange -peach'
  
      Args:
          terms (list): Search terms.
          exclude_screen_name (str): A single screen name to exclude from the search.
  
      Returns:
          A string ready to be passed to tweepy.API.search
      '''
      ors = ' OR '.join('"{}"'.format(x) for x in terms if not x.startswith('-'))
      nots = ' '.join('-"{}"'.format(x[1:]) for x in terms if x.startswith('-'))
      sn = "-from:{}".format(exclude_screen_name) if exclude_screen_name else ''
      return ' '.join((ors, nots, sn))