Question

请，我如何从下面粘贴的HTML代码中提取以下项目。

仅开盘价（7.50）
仅体积图（11,393,304）
今日最高（7.80）
今天的低点（7.15）

<div class="col-1">
<!-- previous close  -->
<div class="section-quote-detail group">
<span class="detail-label">Previous Close</span>
<span class="detail-value">7.50</span>
</div>
<!-- open  -->
<div class="section-quote-detail group">
<span class="detail-label">Open</span>
<span class="detail-value">7.50</span>
</div>
<!-- Volume (daily)  -->
<div class="section-quote-detail group">
<span class="detail-label">Volume</span>
<span class="detail-value">11,393,304</span>
</div>
<!-- 3Month (90 day avg volume)  -->
<div class="section-quote-detail group">
<span class="detail-label">3m Avg Volume</span>
<span class="detail-value">13,978,777</span>
</div>
<!-- Today's High  -->
<div class="section-quote-detail group">
<span class="detail-label">Today’s High</span>
<span class="detail-value">7.80</span>
</div>
<!-- Today's Low  -->
<div class="section-quote-detail group">
<span class="detail-label">Today’s Low</span>
<span class="detail-value">7.15</span>
</div>
</div>

Answer 1

我从您的问题中了解到的是：给定一些文本（例如：打开），您想要查找与其关联的数字（例如：7.50）。

我的解决方案是先找到带有文本的span标签，然后再找到它的同级标签。

def getNumberGivenText(text):
    pattern = re.compile(text)
    #find the span tag with this text
    span_tag = soup.findAll("span", text=pattern)[0]
    #find it's next sibling
    num_tag=span_tag.find_next_sibling()
    #get the value
    number=num_tag.string
    return number

print(getNumberGivenText("Open")) #7.50
print(getNumberGivenText("Today’s Low")) #7.15

Answer 2

尝试一下。基本上遍历标签并获取get_list

中的标签

html = '''
<div class="col-1">
<!-- previous close  -->
<div class="section-quote-detail group">
<span class="detail-label">Previous Close</span>
<span class="detail-value">7.50</span>
</div>
<!-- open  -->
<div class="section-quote-detail group">
<span class="detail-label">Open</span>
<span class="detail-value">7.50</span>
</div>
<!-- Volume (daily)  -->
<div class="section-quote-detail group">
<span class="detail-label">Volume</span>
<span class="detail-value">11,393,304</span>
</div>
<!-- 3Month (90 day avg volume)  -->
<div class="section-quote-detail group">
<span class="detail-label">3m Avg Volume</span>
<span class="detail-value">13,978,777</span>
</div>
<!-- Today's High  -->
<div class="section-quote-detail group">
<span class="detail-label">Today’s High</span>
<span class="detail-value">7.80</span>
</div>
<!-- Today's Low  -->
<div class="section-quote-detail group">
<span class="detail-label">Today’s Low</span>
<span class="detail-value">7.15</span>
</div>
</div>'''


import bs4 

soup = bs4.BeautifulSoup(html, 'html.parser')
data = soup.find_all('div', {'class':'section-quote-detail group'})

get_list = ['Open','Volume',"Today’s High","Today’s Low"]

results = pd.DataFrame()
for element in data:
    if element.select('span.detail-label')[0].text in get_list:
        label = element.select('span.detail-label')[0].text
        value = element.select('span.detail-value')[0].text
        temp_df = pd.DataFrame([[label, value]], columns = ['label', 'value'])
        results = results.append(temp_df).reset_index(drop=True)

如何从HTML标记提取数字

2 个答案: