Best way to code text randomization {one|two|three|etc}

import random
import re

class SpyntaxError(Exception):
    pass

def spin(text):
    while True:
        start = 0
        highest = 0
        level = 0
        highestchunk = None

        for index, char in enumerate(text):
            if char == '{':
                level += 1
                if level >= highest:
                    highest = level
                    start = index
                lastmark = index
            elif char == '}':
                if level == highest:
                    highestchunk = (start, index)

                level -= 1

                if level < 0:
                    raise SpyntaxError('too many closing braces')

                lastmark = index

        if not level == 0:
            raise SpyntaxError('too many opening braces')

        if highestchunk:
            random.choice(text[highestchunk[0]+1:highestchunk[1]].split('|')), text[highestchunk[1]+1:]

            highesttext = text[highestchunk[0]+1:highestchunk[1]]

            text = text[:highestchunk[0]] + random.choice(highesttext.split('|')) + text[highestchunk[1]+1:]
        else:
            return text

import random, re

def spin(text):
    while True:
        matches = re.findall('(\{([^\{]*?)\})', text)
        for match in matches:
            text = text.replace(match[0], random.choice(match[1].split('|')), 1)
        if not matches:
            break

    return text

function spin($string) {
   while(true) {
      if(!preg_match_all('/({([^\{]*?)\})/', $string, $matches))
         break;
      foreach($matches[2] as $i => $match) {
         $parts = explode('|', $match);
         $string = str_replace($matches[0][$i], $parts[rand(0, count($parts)-1)], $string);
      }
   }
   return $string;
}