Extract html tags from a text file through iteration and append them to a list and ignore all other characters in python

问题

I want to be able to read a html file and extract only the tags out of it.

Read one character at a time from the file, ignoring everything to get "<"(ignore "<" as well)

Read one character at a time, appending them to a string until ">" or white space(ignore ">" as well)

  <html>
   <body>
   <h1>This is test</h1>
   <h2> This is test 2<h2>
   </body>
   <html>


   with open('doc.txt', 'r') as f:
            all_lines = []
            # loop through all lines using f.readlines() method
            for line in f.readlines():
                new_line = []
                # this is how you would loop through each alphabet
                for chars in line:
                    new_line.append(chars)
                all_lines.append(new_line)

            print(all_lines)

I can iterate through the text files and can get the list as below:

[['<', 'h', 't', 'm', 'l', '>', '\n'], ['<', 'b', 'o', 'd', 'y', '>', '\n'], ['<', '/', 'b', 'o', 'd', 'y', '>', '\n'], ['<', '/', 'h', 't', 'm', 'l', '>']]

but the expected output should be : [html,body,h1,/h1,/h2,/body,/html]

回答1:

In [10]: re.findall('<(.*?)>', html)
Out[10]: ['html', 'body', 'h1', '/h1', 'h2', 'h2', '/body', '/html']

Simply use regex or a HTMLParser.

来源：https://stackoverflow.com/questions/52239686/extract-html-tags-from-a-text-file-through-iteration-and-append-them-to-a-list-a

标签

python

python-3.x

html-parsing

易学教程内所有资源均来自网络或用户发布的内容，如有违反法律规定的内容欢迎反馈！
该文章没有解决你所遇到的问题?点击提问,说说你的问题,让更多的人一起探讨吧!