python - 在 python beautifulsoup 中查找与其他字符串共享同一类的字符串

Question

我正在尝试从比特币交易中抓取数据。我想通过源解析并获取发送的数量。我目前正在使用 BeautifulSoup 库来实现此目的。包含发送金额的类被多个其他变量使用，因此很难浏览。

到目前为止，这是我的代码:

from bs4 import BeautifulSoup as bfs
import requests

r = requests.get(
    'https://blockchair.com/bitcoin/transaction/744cb5177faaa8f3376d09657a68b719e42ab48b60cb78730a31c7bce91fd9c8')

html = r.text


soup = bfs(html, 'html.parser')

result = ''
for item in soup.find_all('span', string='0'):
    result = soup.find_all('span', {'class': 'grey'})
print(result)

返回:

[<span class="ml-2 grey"><svg aria-hidden="true" class="svg-inline--fa fa-link fa-w-16" data-icon="link" data-prefix="fas" focusable="false" role="img" viewbox="0 0 512 512" xmlns="http://www.w3.org/2000/svg"><path d="M326.612 185.391c59.747 59.809 58.927 155.698.36 214.59-.11.12-.24.25-.36.37l-67.2 67.2c-59.27 59.27-155.699 59.262-214.96 0-59.27-59.26-59.27-155.7 0-214.96l37.106-37.106c9.84-9.84 26.786-3.3 27.294 10.606.648 17.722 3.826 35.527 9.69 52.721 1.986 5.822.567 12.262-3.783 16.612l-13.087 13.087c-28.026 28.026-28.905 73.66-1.155 101.96 28.024 28.579 74.086 28.749 102.325.51l67.2-67.19c28.191-28.191 28.073-73.757 0-101.83-3.701-3.694-7.429-6.564-10.341-8.569a16.037 16.037 0 0 1-6.947-12.606c-.396-10.567 3.348-21.456 11.698-29.806l21.054-21.055c5.521-5.521 14.182-6.199 20.584-1.731a152.482 152.482 0 0 1 20.522 17.197zM467.547 44.449c-59.261-59.262-155.69-59.27-214.96 0l-67.2 67.2c-.12.12-.25.25-.36.37-58.566 58.892-59.387 154.781.36 214.59a152.454 152.454 0 0 0 20.521 17.196c6.402 4.468 15.064 3.789 20.584-1.731l21.054-21.055c8.35-8.35 12.094-19.239 11.698-29.806a16.037 16.037 0 0 0-6.947-12.606c-2.912-2.005-6.64-4.875-10.341-8.569-28.073-28.073-28.191-73.639 0-101.83l67.2-67.19c28.239-28.239 74.3-28.069 102.325.51 27.75 28.3 26.872 73.934-1.155 101.96l-13.087 13.087c-4.35 4.35-5.769 10.79-3.783 16.612 5.864 17.194 9.042 34.999 9.69 52.721.509 13.906 17.454 20.446 27.294 10.606l37.106-37.106c59.271-59.259 59.271-155.699.001-214.959z" fill="currentColor"></path></svg></span>, <span class="ml-2 grey"><svg aria-hidden="true" class="svg-inline--fa fa-copy fa-w-14" data-icon="copy" data-prefix="fas" focusable="false" role="img" viewbox="0 0 448 512" xmlns="http://www.w3.org/2000/svg"><path d="M320 448v40c0 13.255-10.745 24-24 24H24c-13.255 0-24-10.745-24-24V120c0-13.255 10.745-24 24-24h72v296c0 30.879 25.121 56 56 56h168zm0-344V0H152c-13.255 0-24 10.745-24 24v368c0 13.255 10.745 24 24 24h272c13.255 0 24-10.745 24-24V128H344c-13.2 0-24-10.8-24-24zm120.971-31.029L375.029 7.029A24 24 0 0 0 358.059 0H352v96h96v-6.059a24 24 0 0 0-7.029-16.97z" fill="currentColor"></path></svg></span>, <span class="grey ml-2">(<span>a month ago</span>)</span>, <span class="grey">.00319198</span>, <span class="grey">.00023052</span>, <span class="grey">NO</span>, <span class="grey">.00296146</span>, <span class="grey">.00102453</span>, <span class="grey">.00025613</span>, <span class="grey">.00102453</span>, <span class="grey">NO</span>, <span class="grey">NO</span>, <span class="mr-18 ml-8 grey"><svg aria-hidden="true" class="cursor svg-inline--fa fa-clock fa-w-16" data-icon="clock" data-prefix="far" focusable="false" role="img" viewbox="0 0 512 512" xmlns="http://www.w3.org/2000/svg"><path d="M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8zm0 448c-110.5 0-200-89.5-200-200S145.5 56 256 56s200 89.5 200 200-89.5 200-200 200zm61.8-104.4l-84.9-61.7c-3.1-2.3-4.9-5.9-4.9-9.7V116c0-6.6 5.4-12 12-12h32c6.6 0 12 5.4 12 12v141.7l66.8 48.6c5.4 3.9 6.5 11.4 2.6 16.8L334.6 349c-3.9 5.3-11.4 6.5-16.8 2.6z" fill="currentColor"></path></svg></span>, <span class="grey">.00319198</span>, <span class="grey">.00031492</span>, <span class="ml-18 mr-8 grey"><svg aria-hidden="true" class="cursor svg-inline--fa fa-clock fa-w-16" data-icon="clock" data-prefix="far" focusable="false" role="img" viewbox="0 0 512 512" xmlns="http://www.w3.org/2000/svg"><path d="M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8zm0 448c-110.5 0-200-89.5-200-200S145.5 56 256 56s200 89.5 200 200-89.5 200-200 200zm61.8-104.4l-84.9-61.7c-3.1-2.3-4.9-5.9-4.9-9.7V116c0-6.6 5.4-12 12-12h32c6.6 0 12 5.4 12 12v141.7l66.8 48.6c5.4 3.9 6.5 11.4 2.6 16.8L334.6 349c-3.9 5.3-11.4 6.5-16.8 2.6z" fill="currentColor"></path></svg></span>, <span class="grey">.00264654</span>, <span class="ml-18 mr-8 grey"><svg aria-hidden="true" class="cursor svg-inline--fa fa-clock fa-w-16" data-icon="clock" data-prefix="far" focusable="false" role="img" viewbox="0 0 512 512" xmlns="http://www.w3.org/2000/svg"><path d="M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8zm0 448c-110.5 0-200-89.5-200-200S145.5 56 256 56s200 89.5 200 200-89.5 200-200 200zm61.8-104.4l-84.9-61.7c-3.1-2.3-4.9-5.9-4.9-9.7V116c0-6.6 5.4-12 12-12h32c6.6 0 12 5.4 12 12v141.7l66.8 48.6c5.4 3.9 6.5 11.4 2.6 16.8L334.6 349c-3.9 5.3-11.4 6.5-16.8 2.6z" fill="currentColor"></path></svg></span>, <span class="bold grey">NO</span>]

虽然预期的输出应该是:

.00319198

我该怎么办？

Answer 1

您可以使用 CSS 选择器直接找到“发送金额”:.mr-2 span span.grey，从左到右阅读选择器“找到类 grey 下 span 下 span 下类 mr-2"

import requests
from bs4 import BeautifulSoup

url = "https://blockchair.com/bitcoin/transaction/744cb5177faaa8f3376d09657a68b719e42ab48b60cb78730a31c7bce91fd9c8"
soup = BeautifulSoup(requests.get(url).content, "html.parser")

print(soup.select_one(".mr-2 span span.grey").text)

输出:

.00319198