code: def randomize_nick(cls, base, suffix_length=3):
          
          suffix = u''.join(choice(u'0123456789') for _ in range(suffix_length))
          return u'{0}{1}'.format(base, suffix)
docs: Generates a pseudo-random nickname.
  
          :param base: prefix to use for the generated nickname.
          :type base: unicode
          :param suffix_length: amount of digits to append to `base`
          :type suffix_length: int
          :return: generated nickname.
          :rtype: unicode