没有在for循环的列表中追加第一个值

Question

我想使用for循环从列表创建DataFrame。但只有最后一个值附加到数据帧中。需要一个解决方案。我对这个话题很陌生。只是想解决个人问题。你知道吗

我可以用下面提供的代码打印所需的值。但当我试图将这些值附加到数据帧中时，这只是附加列表中的最后一个值。你知道吗

import requests
from bs4 import BeautifulSoup
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.common.exceptions import TimeoutException
import selenium.common.exceptions
import time 
driver = webdriver.Chrome(executable_path='chromedriver')
catlink=['https://www.daraz.com.bd/small-kitchen-appliances/','https://www.daraz.com.bd/bedding-bath/']
for link in catlink:
    driver.get(link)
    time.sleep(10)
    for i in range(0,8):
        driver.find_element_by_xpath('//*[@id="root"]/div/div[2]/div[1]/div[1]/div/div[3]').click()
        i+=i
        elements = driver.find_elements_by_css_selector("div > div:nth-child(2) > div.c2xMr_ > div.ant-carousel > div > div.slick-list>* a")
        for element in elements:
            print(driver.title)
            print(element.get_attribute("href"))

import pandas as pd 
import requests
from bs4 import BeautifulSoup
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.common.exceptions import TimeoutException
import selenium.common.exceptions
import time 

driver = webdriver.Chrome(executable_path='chromedriver')
catlink=['https://www.daraz.com.bd/small-kitchen-appliances/','https://www.daraz.com.bd/bedding-bath/']
for link in catlink:
    driver.get(link)
    time.sleep(10)
    for i in range(0,8):
        try:
            driver.find_element_by_xpath('//*[@id="root"]/div/div[2]/div[1]/div[1]/div/div[3]').click()
            time.sleep(4)
            i+=1
            elements = driver.find_elements_by_css_selector("div > div:nth-child(2) > div.c2xMr_ > div.ant-carousel > div > div.slick-list>* a")
            title=[]
            # hreflink=[]
            for element in elements:
                title.append({'title':driver.title,'link':element.get_attribute("href")})
                df=pd.DataFrame(title)

        except (selenium.common.exceptions.NoSuchElementException):
            NoBanner=list()
            NoBanner.append(driver.title) 
            continue ```

I tried this but now showing the expected result.

Answer 1

您正在为for element in elements循环的每次迭代创建一个新的数据帧，并将其分配给变量df，从而重写df的先前值。你知道吗