from urllib.request import urlopen, Request
import re

r = urlopen(Request('https://books.toscrape.com', headers={'User-Agent': 'Mozilla/5.0'}))
html = r.read().decode('utf-8')

price_search = re.search(r'class="price_color[^"]*"[^>]*>([^<]+)<', html)
if price_search:
    print('Found price pattern 1:', price_search.group(1))
else:
    print('Pattern 1 not found')

price_search2 = re.search(r'price_color">([^<]+)<', html)
if price_search2:
    print('Found price pattern 2:', price_search2.group(1))
else:
    print('Pattern 2 not found')

idx = html.find('price_color')
if idx > 0:
    print('Context around price_color:', html[idx-20:idx+50])