from urllib.request import urlopen
from bs4 import BeautifulSoup

response = urlopen("http://www.ceneo.pl/;szukaj-laptopy;0020-30-0-0-0.htm")
page_source = response.read()
soup = BeautifulSoup(page_source, 'html.parser')

for link in soup.find_all('a'):
    print(link.get('href'))