Python随机生成字符串

class RandomUtil():
    
    '''随机数生成工具类'''
    @staticmethod
    def randomString(length):
        '''生成长度为length的随机字符串'''
        rstr = ''
        while(len(rstr) < length):
            #注意97表示字母a,char的参数为对应的ASCII码的值
    
            tempt = chr(97+random.randint(0,25))
            rstr = rstr.join(['',tempt])
        return rstr