import requests
from bs4 import BeautifulSoup
import re

response = requests.get('https://www.prettylittlething.com/taupe-faux-fur-military-coat.html').text
soup = BeautifulSoup(response, 'html.parser')
script = soup.find(text=re.compile('var pltProductData'))
result = str(re.findall(r'"(https:\\\\\\/\\\\\\/cdn-img[^"]*)\\"', script)).replace('\\', '')
print(result)