Selenium Web驱动程序甚至Javascript执行程序都无法滚动网页

Question

`from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.common.by import By
from selenium.webdriver.common.action_chains import ActionChains
import time
driver = webdriver.Chrome('chromedriver.exe')
driver.get('https://iremedy.com/search?query=Vital%20Signs%20Monitors')
time.sleep(5)
element = driver.find_element(By.CLASS_NAME, 'body').send_keys(Keys.END)`

我试过各种方法，但都不起作用。请帮帮我。

Answer 1

这是滚动页面并加载项目的一种方法：

from selenium import webdriver
from selenium.webdriver.chrome.service import Service
from selenium.webdriver.chrome.options import Options
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.webdriver.common.keys import Keys
from selenium.webdriver.common.action_chains import ActionChains
import pandas as pd
import time as t
chrome_options = Options()
chrome_options.add_argument("--no-sandbox")
chrome_options.add_argument('disable-notifications')
chrome_options.add_argument("window-size=1280,720")
webdriver_service = Service("chromedriver/chromedriver") ## path to where you saved chromedriver binary
browser = webdriver.Chrome(service=webdriver_service, options=chrome_options)
wait = WebDriverWait(browser, 20)
url = 'https://iremedy.com/search?query=Vital%20Signs%20Monitors'
browser.get(url)
items_list = []
while True:
elements_on_page = wait.until(EC.presence_of_all_elements_located((By.CSS_SELECTOR, '[class^="card"]')))
print(len(elements_on_page), 'total items found')
if len(elements_on_page) > 100:
print('more than 100 found, stopping')
break
footer = wait.until (EC.presence_of_element_located((By.CSS_SELECTOR, 'footer[id="footer"]')))
footer.location_once_scrolled_into_view
t.sleep(2)
for el in elements_on_page:
title = el.find_element(By.CSS_SELECTOR, 'h3[class="title"]')
price = el.find_element(By.CSS_SELECTOR, 'div[class="price"]')
items_list.append((title.text.strip(), price.text.strip()))
df = pd.DataFrame(items_list, columns = ['Item', 'Price'])
print(df)

终端打印的结果为：

10 total items found
20 total items found
20 total items found
30 total items found
30 total items found
40 total items found
50 total items found
60 total items found
70 total items found
80 total items found
90 total items found
100 total items found
110 total items found
more than 100 found, stopping
Item    Price
0   Edan M3A Vital Signs Monitors   $2,714.95
1   M3 Vital Signs Monitors by Edan Instruments $2,476.95
2   Vital Signs Patient Monitors - Touch Screen $2,015.95
3   RVS-100 Advanced Vital Signs Monitors by Riester    $362.95
4   Edan iM80 Vital Signs Patient Monitors  $5,291.95
... ... ...
105 Patient Monitor Connex® Vital Signs Monitoring...   $10,571.95
106 Patient Monitor Connex® Spot Check and Vital S...   $5,089.95
107 Patient Monitor Connex® Spot Check and Vital ...    $5,964.95
108 Patient Monitor X Series® Vital Signs Monitori...   $48,978.95
109 Patient Monitor Connex® Spot Check and Vital S...   $4,391.95
110 rows × 2 columns

一旦我达到100，我就打破循环，你可以更高。。需要注意的是，还有另一种获取数据的方法，即从中提取数据的GraphQL端点。尽管如此，这就是使用硒的方法。有关文档，请参阅https://www.selenium.dev/documentation/