我正在嘗試做的事情：我正在嘗試編寫一個腳本來抓取網站以獲取產品信息。目前，該程序使用 for 循環(huán)來獲取產品價格和唯一 ID。for 循環(huán)包含兩個 if 語句以阻止它抓取 NoneType。import requestsfrom bs4 import BeautifulSoupdef average(price_list):    return sum(price_list) / len(price_list)# Requests search data from Websitepage_link = 'URL'page_response = requests.get(page_link, timeout=5)  # gets the webpage (search) from Websitepage_content = BeautifulSoup(page_response.content, 'html.parser')  # turns the webpage it just retrieved into a BeautifulSoup-object# Selects the product listings from page content so we can work with theseproduct_listings = page_content.find_all("div", {"class": "unit flex align-items-stretch result-item"})prices = []  # Creates a list to add the prices touids = [] # Creates a list to store the unique idsfor product in product_listings:## UIDS     if product.find('a')['id'] is not None:        uid = product.find('a')['id']        uids.append(uid)# PRICES    if product.find('p', class_ = 'result-price man milk word-break') is not None:# assures that the loop only finds the prices        price = int(product.p.text[:-2].replace(u'\xa0', ''))  # makes a temporary variable where the last two chars of the string (,-) and whitespace are removed, turns into int        prices.append(price)  # adds the price to the list問題：上if product.find('a')['id'] is not None:，我得到一個Exception has occurred: TypeError'NoneType' object is not subscriptable.不管是誰，如果我跑了print(product.find('a')['id'])，我就會得到我正在尋找的價值，這讓我很困惑。這不意味著錯誤不是 NoneType 嗎？此外，if product.find('p', class_ = 'result-price man milk word-break') is not None:工作完美無缺。我試過的：我試過分配if product.find('p', class_ = 'result-price man milk word-break')給一個變量，然后在 for 循環(huán)中運行它，但這不起作用。我也做了我應得的谷歌搜索，但沒有占上風。問題可能是我對編程比較陌生，不知道要搜索什么，但我仍然找到了很多似乎與相關問題有關的答案，但這在我的工作中不起作用代碼。任何幫助將不勝感激！