python3.3：文本文件读取、处理及保存。小练习

# -*- coding: utf-8 -*-

html = ""
fo = open(‘d:/chengyu.txt‘, ‘a+‘) #以读写方式处理文件IO
fo.seek(0)
str_line = fo.readline()
while str_line:
    # print(str_line)
    str_line = fo.readline()

    # 有两种标签<h3> 和 <p>，处理<p>标签中所含的成语
    # str_line = "<p>急中生智 仰不愧天 镇定自若 化险为夷</p>"
    str_line2 = ""
    is_word = str_line.find("<p>")
    if is_word>-1:
        print("----是成语所在行----")
        # print(str_line)
        str_line = str_line.replace("<p>","")
        str_line = str_line.replace("</p>","")
        str_line = str_line.replace("\n","")
        for _word in str_line:
            if _word.find(" ")>-1:
                str_line2 = str_line2 + "</u>" + _word + "<u>"
            elif _word.find("、")>-1:
                str_line2 = str_line2 + "</u>" + _word + "<u>"
            else:
                str_line2 = str_line2 + _word
        str_line2 = "<u>" + str_line2 + "</u>"
        html = html + "<p>" + str_line2 + "</p>\n"

    else:
        print("----NO-所在行----")
        html = html + str_line
        # print(str_line)
fo.close


fo2 = open(‘d:/test111.txt‘,"w")
fo2.write(html)
fo2.close()