def parse():    html = get_html(URL)    if html.status_code == 200:        phones = []        pages_count = pages(html.text)        for page in range(1, pages_count + 1):            print(f'Parsing a page {page} from {pages_count}...')            html = get_html(URL, params={'p': page})            phones.extend(get_content(html.text))        print(phones)    else:        print('Error')嗨，我想列出項目，但出現(xiàn)錯誤  File "C:/Users/User/PycharmProjects/Parser/parser.py", line 52, in <module>    parse()  File "C:/Users/User/PycharmProjects/Parser/parser.py", line 46, in parse    phones.extend(get_content(html.text))TypeError: 'NoneType' object is not iterab這是所有代碼：import requestsfrom bs4 import BeautifulSoupURL = 'https://comfy.ua/smartfon/'HEADERS = {'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:71.0) Gecko/20100101 Firefox/71.0',           'accept': '*/*'}def get_html(url, params=None):    r = requests.get(url, headers=HEADERS, params=params)    return rdef pages(html):    soup = BeautifulSoup(html, 'html.parser')    pagination = soup.find_all('li', class_='pager__number')    if pagination:        return int(pagination[-2].get_text())    else:        return 1def get_content(html):    soup = BeautifulSoup(html, 'html.parser')    items = soup.find_all('div', class_="product-item__i")    phone = []    for item in items:        phone.append({            'title': item.find('p', class_="product-item__name").get_text(strip=True),            'link': item.find('a', class_="product-item__name-link js-gtm-product-title").get('href'),            'price': item.find('div', class_="price-box__content-i").get_text(strip=True).replace(u'\xa0', u' ')        })    print(phone)我得到一個空列表，但應(yīng)該拿到電話。我也收到一個錯誤。