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Python转换HTML到Text纯文本的方法

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2016-06-10 15:18:172358browse

本文实例讲述了Python转换HTML到Text纯文本的方法。分享给大家供大家参考。具体分析如下:

今天项目需要将HTML转换为纯文本,去网上搜了一下,发现Python果然是神通广大,无所不能,方法是五花八门。

拿今天亲自试的两个方法举例,以方便后人:

方法一:

1. 安装nltk,可以去pipy装

(注:需要依赖以下包:numpy, PyYAML)

2.测试代码:

复制代码 代码如下:
>>> import nltk 
>>> aa = r'''''

   
 Project: DeHTML

 Description:

 This small script is intended to allow conversion from HTML markup to 
 plain text.
   

'''
>>> aa 
'\n\n            \n                Project: DeHTML
\n                Description:
\n                This small script is intended to allow conversion from HTML markup to \n                plain text.\n            \n        \n        ' 
>>> print nltk.clean_html(aa) 
Project: DeHTML  
     Description :  
    This small script is intended to allow conversion from HTML markup to  
    plain text.

方法二:

如果觉得nltk太笨重,大材小用的话,可以自己写代码,代码如下:

复制代码 代码如下:
from HTMLParser import HTMLParser 
from re import sub 
from sys import stderr 
from traceback import print_exc 
 
class _DeHTMLParser(HTMLParser): 
    def __init__(self): 
        HTMLParser.__init__(self) 
        self.__text = [] 
 
    def handle_data(self, data): 
        text = data.strip() 
        if len(text) > 0: 
            text = sub('[ \t\r\n]+', ' ', text) 
            self.__text.append(text + ' ') 
 
    def handle_starttag(self, tag, attrs): 
        if tag == 'p': 
            self.__text.append('\n\n') 
        elif tag == 'br': 
            self.__text.append('\n') 
 
    def handle_startendtag(self, tag, attrs): 
        if tag == 'br': 
            self.__text.append('\n\n') 
 
    def text(self): 
        return ''.join(self.__text).strip() 
 
 
def dehtml(text): 
    try: 
        parser = _DeHTMLParser() 
        parser.feed(text) 
        parser.close() 
        return parser.text() 
    except: 
        print_exc(file=stderr) 
        return text 
 
 
def main(): 
    text = r'''''
       
           
                Project: DeHTML

                Description:

                This small script is intended to allow conversion from HTML markup to 
                plain text.
           
       
    ''' 
    print(dehtml(text)) 
 
 
if __name__ == '__main__': 
    main()

运行结果:

>>> ================================ RESTART ================================ 
>>>  
Project: DeHTML  
Description :  
This small script is intended to allow conversion from HTML markup to plain text. 

希望本文所述对大家的Python程序设计有所帮助。

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