写一个代码，要求：对文本文件内容进行jieba分词和词性标注，并将词性标注结果写入文本文件中

import jieba.posseg as pseg

# 打开文本文件
with open("input.txt", "r", encoding="utf-8") as f:
text = f.read()

# 对文本进行分词和词性标注
words = pseg.cut(text)

# 将词性标注结果写入输出文件
with open("output.txt", "w", encoding="utf-8") as f:
for word, flag in words:
f.write("%s\t%s\n" % (word, flag))