How To Use Beautifulsoup To Get The Same Result Obtained By Regex?

I'm trying to extract all the values (which are links) of attribute data-src-mp3 in the content1 generated from the url. The link is contained in ] for tag in soup.select('.cB.cB-def.dictionary.biling [data-src-mp3]')]

or

mp3s = list(map(lambda tag: tag.attrs['data-src-mp3'],
                soup.select('.cB.cB-def.dictionary.biling [data-src-mp3]')))

[data-src-mp3] selects only elements that have the data-src-mp3 attribute (with any value).

With a small change to have 'data-src-mp3' in a single place:

mp3_tag = 'data-src-mp3'
mp3s = list(map(lambda tag: tag.attrs[mp3_tag],
                soup.select('.cB.cB-def.dictionary.biling [{}]'.format(mp3_tag))))

This solution might look more intimidating at first, but is much better than relying on the wrong tool (such as regex when parsing HTML).