Python 如何将For循环数据写入CSV文件

我正在构建一个机器人，它可以从ebay上获取产品的价格，并将所有信息写入csv文件。但当它使用for循环将信息输入到csv文件时，我遇到了麻烦。如何将所有for循环数据写入csv文件。由于for循环，代码只写入最后一个产品的信息

headers = {'User-Agent':'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36'}

searchterm = "Laptops"
url = f'https://www.ebay.com/sch/i.html?_from=R40&_nkw={searchterm}&_sacat=0&LH_PrefLoc=1&LH_Auction=1&rt=nc&LH_Sold=1&LH_Complete=1'

response = requests.get(url,headers=headers)
soup = BeautifulSoup(response.content,'html.parser')

for item in soup.select('.s-item'):
    print(len(soup.select('.s-item')))
    try:
        print(item.select('.s-item__title')[0].get_text())
        print(item.select('.s-item__subtitle')[0].get_text())
        print(item.select('.s-item__price')[0].get_text())
        print(item.select('.s-item__location')[0].get_text())
        print(item.select('.s-item__shipping')[0].get_text())
        print("\n\n\n----------------------------------------------")
        with open('Products.csv', mode='w') as file_in:
            writers = csv.writer(writers)
            employee_writer.writerow(['Product', 'Price'])
            employee_writer.writerow(['', ''])
            employee_writer.writerow([item.select('.s-item__title')[0].get_text(),item.select('.s-item__price')[0].get_text()])
    except Exception as e:
        print("ERROR!")

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我希望表看起来像

构造代码，以便在循环之外打开文件：

with open('Products.csv', mode='w') as file_in:
    writers = csv.writer(writers)
    for item in soup.select('.s-item'):
        # etc...

所发生的事情是，循环的每次迭代都会打开文件，并使用

mode='w'

覆盖文件内容