use*_*364 100 python selenium automated-tests selenium-webdriver
我目前正在使用selenium webdriver来解析Facebook用户朋友页面并从AJAX脚本中提取所有ID.但我需要向下滚动才能吸引所有朋友.如何在Selenium中向下滚动.我正在使用python.
OWA*_*DVL 194
您可以使用
driver.execute_script("window.scrollTo(0, Y)")
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其中Y是高度(在全高清监视器上它是1080).(感谢@lukeis)
你也可以使用
driver.execute_script("window.scrollTo(0, document.body.scrollHeight);")
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滚动到页面底部.
如果你想scrool到一个无限加载的页面,如社交网络,Facebook等(感谢@Cong Tran)
SCROLL_PAUSE_TIME = 0.5
# Get scroll height
last_height = driver.execute_script("return document.body.scrollHeight")
while True:
# Scroll down to bottom
driver.execute_script("window.scrollTo(0, document.body.scrollHeight);")
# Wait to load page
time.sleep(SCROLL_PAUSE_TIME)
# Calculate new scroll height and compare with last scroll height
new_height = driver.execute_script("return document.body.scrollHeight")
if new_height == last_height:
break
last_height = new_height
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Cuo*_*ran 61
如果要向下滚动到无限页面的底部(如linkedin.com),可以使用以下代码:
SCROLL_PAUSE_TIME = 0.5
# Get scroll height
last_height = driver.execute_script("return document.body.scrollHeight")
while True:
# Scroll down to bottom
driver.execute_script("window.scrollTo(0, document.body.scrollHeight);")
# Wait to load page
time.sleep(SCROLL_PAUSE_TIME)
# Calculate new scroll height and compare with last scroll height
new_height = driver.execute_script("return document.body.scrollHeight")
if new_height == last_height:
break
last_height = new_height
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参考:https://stackoverflow.com/a/28928684/1316860
luk*_*eis 19
与此处显示的方法相同:
在python中你可以使用
driver.execute_script("window.scrollTo(0, Y)")
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(Y是您要滚动到的垂直位置)
LIU*_*YUE 18
from selenium.webdriver.common.keys import Keys
html = browser.find_element_by_tag_name('html')
html.send_keys(Keys.END)
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测试,它的工作原理
pre*_*ion 12
element=find_element_by_xpath("xpath of the li you are trying to access")
element.location_once_scrolled_into_view
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当我试图访问一个看不见的'li'时,这有帮助.
小智 8
下面是一个示例 selenium 代码片段,您可以将其用于此类目的。它会转到“枚举 python 教程”上的 YouTube 搜索结果的网址,然后向下滚动,直到找到标题为“枚举 python 教程(2020)”的视频。
driver.get('https://www.youtube.com/results?search_query=enumerate+python')
target = driver.find_element_by_link_text('Enumerate python tutorial(2020).')
target.location_once_scrolled_into_view
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出于我的目的,我想向下滚动更多,同时牢记窗口的位置。我的解决方案是相似的,并使用window.scrollY
driver.execute_script("window.scrollTo(0, window.scrollY + 200)")
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它将转到当前的y滚动位置+ 200
小智 7
这是您向下滚动网页的方式:
driver.execute_script("window.scrollTo(0, 1000);")
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滚动加载页面。示例:medium、quora 等
last_height = driver.execute_script("return document.body.scrollHeight")
while True:
driver.execute_script("window.scrollTo(0, document.body.scrollHeight-1000);")
# Wait to load the page.
driver.implicitly_wait(30) # seconds
new_height = driver.execute_script("return document.body.scrollHeight")
if new_height == last_height:
break
last_height = new_height
# sleep for 30s
driver.implicitly_wait(30) # seconds
driver.quit()
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此代码滚动到底部,但不需要您每次都等待。它会不断滚动,然后停在底部(或超时)
from selenium import webdriver
import time
driver = webdriver.Chrome(executable_path='chromedriver.exe')
driver.get('https://example.com')
pre_scroll_height = driver.execute_script('return document.body.scrollHeight;')
run_time, max_run_time = 0, 1
while True:
iteration_start = time.time()
# Scroll webpage, the 100 allows for a more 'aggressive' scroll
driver.execute_script('window.scrollTo(0, 100*document.body.scrollHeight);')
post_scroll_height = driver.execute_script('return document.body.scrollHeight;')
scrolled = post_scroll_height != pre_scroll_height
timed_out = run_time >= max_run_time
if scrolled:
run_time = 0
pre_scroll_height = post_scroll_height
elif not scrolled and not timed_out:
run_time += time.time() - iteration_start
elif not scrolled and timed_out:
break
# closing the driver is optional
driver.close()
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这比每次等待 0.5-3 秒等待响应要快得多,而该响应可能需要 0.1 秒
我正在寻找一种滚动动态网页的方法,并在到达页面末尾时自动停止,并找到了这个线程。
@Cuong Tran的帖子做了一个主要修改,就是我正在寻找的答案。我认为其他人可能会发现修改有用(它对代码的工作方式有明显的影响),因此这篇文章。
修改是将捕获的最后一页高度的声明内循环(使每个检查比较前一页面的高度)。
所以,下面的代码:
不断向下滚动动态网页 (
.scrollTo()),仅在一次迭代中页面高度保持不变时停止。
(还有另一个修改,其中 break 语句位于另一个可以删除的条件内(以防页面“粘住”)。
SCROLL_PAUSE_TIME = 0.5
while True:
# Get scroll height
### This is the difference. Moving this *inside* the loop
### means that it checks if scrollTo is still scrolling
last_height = driver.execute_script("return document.body.scrollHeight")
# Scroll down to bottom
driver.execute_script("window.scrollTo(0, document.body.scrollHeight);")
# Wait to load page
time.sleep(SCROLL_PAUSE_TIME)
# Calculate new scroll height and compare with last scroll height
new_height = driver.execute_script("return document.body.scrollHeight")
if new_height == last_height:
# try again (can be removed)
driver.execute_script("window.scrollTo(0, document.body.scrollHeight);")
# Wait to load page
time.sleep(SCROLL_PAUSE_TIME)
# Calculate new scroll height and compare with last scroll height
new_height = driver.execute_script("return document.body.scrollHeight")
# check if the page height has remained the same
if new_height == last_height:
# if so, you are done
break
# if not, move on to the next loop
else:
last_height = new_height
continue
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您可以使用send_keys模拟PAGE_DOWN键按下(通常滚动页面):
from selenium.webdriver.common.keys import Keys
html = driver.find_element_by_tag_name('html')
html.send_keys(Keys.PAGE_DOWN)
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小智 5
这些答案对我都不起作用,至少不是向下滚动Facebook搜索结果页面有效,但经过大量测试,我发现此解决方案:
while driver.find_element_by_tag_name('div'):
driver.execute_script("window.scrollTo(0, document.body.scrollHeight);")
Divs=driver.find_element_by_tag_name('div').text
if 'End of Results' in Divs:
print 'end'
break
else:
continue
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小智 5
我发现解决该问题的最简单方法是选择一个标签,然后发送:
label.sendKeys(Keys.PAGE_DOWN);
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希望它能起作用!
与youtube一起使用时,浮动元素的滚动高度为“ 0”,因此请不要使用“ return document.body.scrollHeight”,而是 根据您的互联网尝试使用此“ return document.documentElement.scrollHeight”来调整滚动暂停时间否则它将仅运行一次,然后在此之后中断。
SCROLL_PAUSE_TIME = 1
# Get scroll height
"""last_height = driver.execute_script("return document.body.scrollHeight")
this dowsnt work due to floating web elements on youtube
"""
last_height = driver.execute_script("return document.documentElement.scrollHeight")
while True:
# Scroll down to bottom
driver.execute_script("window.scrollTo(0,document.documentElement.scrollHeight);")
# Wait to load page
time.sleep(SCROLL_PAUSE_TIME)
# Calculate new scroll height and compare with last scroll height
new_height = driver.execute_script("return document.documentElement.scrollHeight")
if new_height == last_height:
print("break")
break
last_height = new_height
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