python模块 - re模块使用示例

悠悠 2022-08-01 12:18 253阅读 0赞

http://[blog.csdn.net/pipisorry/article/details/46619179][blog.csdn.net_pipisorry_article_details_46619179]

re模块匹配规则见：[http://blog.csdn.net/pipisorry/article/details/25909899][http_blog.csdn.net_pipisorry_article_details_25909899]

## **python正则表达式匹配年月日** ##

(?:\d{4}[年./]|\d{2}年)(?:(?<!\d)(?:[1-9]|1[0-2])(?!\d)[月./])?(?:\d{1,2}[日号]{0,1})?|(?:\d{4}[年./]|\d{2}年)?(?:(?<!\d)(?:[1-9]|1[0-2])(?!\d)[月./])(?:\d{1,2}[日号]{0,1})?|(?:\d{4}[年./]|\d{2}年)?(?:(?<!\d)(?:[1-9]|1[0-2])(?!\d)[月./])?(?:\d{1,2})[日号]|(?:今|明|后)(?:天|日|晚)|明天的明天|(?:月|年)(?:底|末)|(?:上个?|下个?|这个?)?(?:周|星期)(?:几|\d+|[一二三四五六七日天]|末)|(?:上个?|下个?|这个?)(?:周|星期)|\d+[日天]?[-于到至－]\d+[日天]|(?:\d{1,2})多?天(?:之?后)?|(?:[一二三四五六七]|\d+)(?:周|个?星期|个月|年)

月：(?<!\\d)(?:\[1-9\]|1\[0-2\])(?!\\d)月

## **python正则表达式进行日志分析** ##

日志分析时，假设给定的字符串：  
char str = “10.10.1.1 \[2015/04/22 +0800\] /ab/cd/？test0=123&test2=234 xxxx”; 要从中获取2015/04/22、/ab/cd/和234等值。

> str = “10.10.1.1 \[2015/04/22 +0800\] /ab/cd/？test0=123&test2=234 xxxx”  
> print(re.findall(“\\d\{4\}/\\d\{2\}/\\d\{2\}|/\\w\{2\}/\\w\{2\}|(?<=test2=)\\d+”, str))
> 
>

## **用urllib2、re、os 模块下载文件的脚本** ##

!/usr/bin/env python  
importurllib2  
importre  
importos  
URL=’[http://image.baidu.com/channel/wallpaper][http_image.baidu.com_channel_wallpaper]’  
read=urllib2.urlopen(URL).read()  
pat =re.compile(r’src=\\’\#\\’” //.+?.js”>’)  
urls=re.findall(pat,read)  
fori inurls:  
url=i.replace(‘src=\\’\#\\’” /code>,”).replace(‘”>’,”)  
try:  
iread=urllib2.urlopen(url).read()  
name=os.path.basename(url)  
with open(name,’wb’) as jsname:  
jsname.write(iread)  
except:

printurl,”url error”

**将所有文档中不同问题分别汇总到同一个文件中**

def shift():
        '''
        筛选所有人不同问题的答案到对应的文件中
        :return:
        '''
        INPUT_DIR = r'C:\Users\pi\Desktop\txts'
        ANSWER_DIR = r'C:\Users\pi\Desktop\answers'
        if not path.exists(ANSWER_DIR):
            makedirs(ANSWER_DIR)
    
        questions = ['在计科四班度过大学四年是一种怎样的体验', '对班上的哪位同学第一印象最深刻，简述原因', '简述让你印象深刻的班上某位同学的一件小事', '想对你的室友说什么', '大学你最遗憾的事',
                     '最难忘或最感动或最想珍惜的一件事或人', '马上要毕业了，此刻的你内心是一种怎样的体验', '想对你暗恋or前女友or现任恋人说什么', '（写完后记得将文档重命名加上你的姓名）']
        answer_filenames = [str(i) + '.txt' for i in range(len(questions) - 1)]
    
        for doc_name in listdir(INPUT_DIR):
            print(doc_name)
            doc_full_name = path.join(INPUT_DIR, doc_name)
            # print(doc_full_name)
            open(doc_full_name)
            with open(doc_full_name) as doc_file:
                # file_str = ''.join(doc_file.read().split('\n'))
                file_str = doc_file.read()
                # print(file_str)
                for cur_question, post_question, answer_filename in zip(questions, questions[1:], answer_filenames):
                    patten = cur_question + '[:：](.+)' + post_question
                    try:
                        answer = re.findall(patten, file_str, re.S)[0]
                        # print(answer)
                        answer = re.split('\.|\d+', doc_name)[1] + '：' + answer.strip() + '\n'
                        print(answer)
                        with open(path.join(ANSWER_DIR, answer_filename), 'a') as answer_file:
                            answer_file.write(answer)
                    except:
                        print(RED, "Error in file:", DEFAULT, doc_full_name, RED, "question:", DEFAULT, cur_question)
                #     break
                # break

from:[http://blog.csdn.net/pipisorry/article/details/46619179][blog.csdn.net_pipisorry_article_details_46619179]

ref:[python模块 - re模块][http_blog.csdn.net_pipisorry_article_details_25909899]

[python正则表达式 ][python_]

[blog.csdn.net_pipisorry_article_details_46619179]: http://blog.csdn.net/pipisorry/article/details/46619179
[http_blog.csdn.net_pipisorry_article_details_25909899]: http://blog.csdn.net/pipisorry/article/details/25909899
[http_image.baidu.com_channel_wallpaper]: http://image.baidu.com/channel/wallpaper
[python_]: http://blog.csdn.net/pipisorry/article/details/24143801