从HTML文档中提取特定的字符串 [英] Extracting a specific string out an HTML document

问题描述

我需要从脱机HTML文档中仅抽取和提取特定字符串，并将该信息写入* .txt文件。

I need to sample and extract only a specific string out of an offline HTML document and write that information nice and clean into a *.txt file.

因此，对于例如，假设这是HTML文件的一部分：

So for example, lets assume that this is a section of the HTML file:

    <span id="dataView01">001.00 SPL</span>
    <span id="dataView02">543.00 SPL</span>
    <span id="dataView03">056.00 SPL</span>
    <span id="dataView04">228.00 SPL</span>

我需要这样做：

   001.00 SPL
   543.00 SPL
   056.00 SPL
   228.00 SPL

您可以帮我解决这个问题，
谢谢。

Could you please help me with this, Thanks.

推荐答案

使用HTML解析器，如 BeautifulSoup 。

示例：

Use an HTML parser like BeautifulSoup.
Example:

from bs4 import BeautifulSoup as bs
import re

markup = '''<span id="dataView01">001.00 SPL</span>
    <span id="dataView02">543.00 SPL</span>
    <span id="dataView03">056.00 SPL</span>
    <span id="dataView04">228.00 SPL</span>'''

soup = bs(markup)
tags = soup.find_all('span', id=re.compile(r'[dataView]\d+'))
for t in tags:  
    print(t.text)

结果：

Result:

001.00 SPL
543.00 SPL
056.00 SPL
228.00 SPL

---

下一步;写入.txt文件：

---

Next step; write to .txt file:

import csv

with open('output.txt','wb') as fou:
    csv_writer = csv.writer(fou)
    for tag in tags:
        split_on_whitespace = t.text.split()
        csv_writer.writerow(split_on_whitespace)

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