import requests, bs4

url = "https://market.yandex.by/catalog--mobilnye-telefony/54726/list?hid=91491&lr=0&onstock=1&local-offers-first=0"
r = requests.get(url)
r.encoding = 'UTF8'

b = bs4.BeautifulSoup(r.text, "html.parser")

atitles = b.select("h3.n-snippet-cell2__title a")
aprice = b.select("div.n-snippet-cell2__price a")

d = {}

for a in atitles:
    for a1 in aprice:
        d.setdefault(a.getText(), a1.getText())

print(d)