Parsing bitcoin address in html

I'm trying to use the beautiful soup lib to parse a webpage and find bitcoin addresses.

I've managed to pull the class containing a generated address out of the whole html document:

<div class="roundpic qrcode" data-height="80" data-text="bitcoin:1JL7kugm1vDLqyzrVPAPdcbjH3PTxcPcud?amount=0.0573" data-width="80" style="margin: auto"></div>, <div class="roundpic qrcode" data-height="160" data-text="bitcoin:1JL7kugm1vDLqyzrVPAPdcbjH3PTxcPcud?amount=0.0573" data-width="160" style="padding: 10px"></div>

What would be the best way to isolate the address? I know the length can be between 27-34 characters but it will always appear in between 'bitcoin:' and '?'. Is there a regex I could use?

Thanks

Solution

You don't really need a regex. Basic string operations work just fine:

import re
from bs4 import BeautifulSoup

html = '''
<div class="roundpic qrcode" data-height="80" data-text="bitcoin:1JL7kugm1vDLqyzrVPAPdcbjH3PTxcPcud?amount=0.0573" data-width="80" style="margin: auto"></div>
<div class="roundpic qrcode" data-height="160" data-text="bitcoin:1JL7kugm1vDLqyzrVPAPdcbjH3PTxcPcud?amount=0.0573" data-width="160" style="padding: 10px"></div>
'''

soup = BeautifulSoup(html)

for div in soup.find_all('div', {'data-text': re.compile(r'^bitcoin:')}):
    address, amount = div.get('data-text').replace('bitcoin:', '').split('?amount=')

soup.find_all('div', {'data-text': re.compile(r'^bitcoin:')}) finds all <div> elements where the data-text attribute's value starts with bitcoin:. You could have also used:

soup.find_all('div', {'data-text': lambda value: value.startswith('bitcoin:')})