我有一個簡單的 for 循環，它運行但打印每個鏈接 3 次。為什么？（頁面共有 3 個“事件”）我試圖從中抓取的網站 = https://www.aacr.org/get-involved/events/這是代碼->import requestsfrom bs4 import BeautifulSoupimport pandas as pdproductlinks = []url='https://www.aacr.org/get-involved/events/'r=requests.get(url)soup=BeautifulSoup(r.content,'html.parser')productlist=soup.find_all('article',class_='event')for item in productlist:    for link in item.find_all('a',href=True):        productlinks.append(link['href'])print(productlinks)Any insights on how i can make it run 1 per link