Use regex to parse HTML and make a Bandcamp embed.

bandcamp.py

"""Use regex to parse HTML and make a Bandcamp embed."""

import re

import requests

TEMPLATE = """
<iframe style="border: 0; width: 276px; height: 390px;"
src="https://bandcamp.com/EmbeddedPlayer/track={track_number}/size=large/bgcol=ffffff/linkcol=17a2b8/tracklist=false/"
seamless>
    <a href="{track_url}">{track_name}</a>
</iframe>
"""


def make_embed(url):
    try:
        response = requests.get(url)
    except requests.exceptions.RequestException:
        return

    page_content = response.text
    track_name = get_track_name(page_content)
    track_number = get_track_number(page_content)
    track_url = get_track_url(page_content)

    if not (track_name and track_number and track_url):
        return

    return TEMPLATE.format(track_name=track_name, track_number=track_number, track_url=track_url)


def get_track_name(html):
    result = re.search(r'<meta\s+name="title"\s*content="(.+)">', html)
    if result:
        return result.group(1)


def get_track_number(html):
    result = re.search(r'/track=(\d+)/', html)
    if result:
        return result.group(1)


def get_track_url(html):
    result = re.search(r'<meta\s+property="og:url"\s*content="(\S+)\">', html)
    if result:
        return result.group(1)


if __name__ == '__main__':
    print(make_embed('https://boypablo.bandcamp.com/track/losing-you'))  # valid track link returns embed
    print(make_embed(''))  # invalid link returns None
    print(make_embed('https://bandcamp.com'))  # non-track link returns None
    print(make_embed('https://boypablo.bandcamp.com'))  # non-track link returns None
    print(make_embed('https://boypablo.bandcamp.com/album/roy-pablo'))  # non-track link returns None