把下面函数转为多线程运行

Question

下面这个代码是用来输出所有09，az的四位数组合，要把它转成多线程运行

def get_pwd(str, num):
    if (num == 1):
        for x in str:
            yield x
    else:
        for x in str:
            for y in get_pwd(str, num - 1):
                yield x + y

if __name__ == '__main__':
    strKey = "0123456789abcdefghijklmnopqrstuvwxyz"
    for x in get_pwd(strKey,4):
        print(x)

Answer 1

没法转成多线程
这个是迭代函数,转成多线程就不能按照顺序迭代运行了