Linestampを抽出するためのコードです。

linestamp.py

import requests
from bs4 import BeautifulSoup


r = requests.get("https://store.line.me/stickershop/product/13584756/ja")
soup = BeautifulSoup(r.content, "html.parser")

urls = []
for span in soup.find_all("span", class_="mdCMN09Image"):
    if not span.get("style")[21:-2] in urls:
        urls.append(span.get("style")[21:-2])

with open("urls.txt", "w") as f:
    f.write("\n".join(url for url in urls))