Question

我正在使用以下代码从网页中获取所有<script>...</script>内容（请参阅代码中的网址）：

import urllib2
from bs4 import BeautifulSoup
import re
import imp

url = "http://racing4everyone.eu/2015/10/25/formula-e-201516formula-e-201516-round01-china-race/"
page = urllib2.urlopen(url)
soup = BeautifulSoup(page.read())

script = soup.find_all("script")
print script #just to check the output of script

但是，BeautifulSoup会在网页的源代码（Chrome中的Ctrl + U）中进行搜索。但是，我想在网页的元素代码（Ctrl + Shift + I in chrome）中进行BeautifulSoup搜索。

我希望它能够这样做，因为我真正感兴趣的代码是在元素代码中，而不是在源代码中。

Answer 1

首先要明白的是，BeautifulSoup和urllib2都不是浏览器。 urllib2只会获取/下载您的初始＆＃34;静态＆＃34;页面 - 它不能像真正的浏览器那样执行JavaScript。因此，您将始终获得＆＃34;查看页面来源＆＃34;内容。

要解决您的问题 - 通过selenium启动真实的浏览器，等待页面加载，获取.page_source并将其传递给BeautifulSoup进行解析：

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


driver = webdriver.Firefox()
driver.get("http://racing4everyone.eu/2015/10/25/formula-e-201516formula-e-201516-round01-china-race/")

# wait for the page to load
wait = WebDriverWait(driver, 10)
wait.until(EC.visibility_of_element_located((By.CSS_SELECTOR, ".fluid-width-video-wrapper")))

# get the page source
page_source = driver.page_source

driver.close()

# parse the HTML
soup = BeautifulSoup(page_source, "html.parser")
script = soup.find_all("script")
print(script)

这是一般方法，但您的情况稍有不同 - 有一个iframe元素包含视频播放器。如果您想访问script中的iframe元素，则需要切换到该元素，然后获取.page_source：

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


driver = webdriver.Firefox()
driver.get("http://racing4everyone.eu/2015/10/25/formula-e-201516formula-e-201516-round01-china-race/")

# wait for the page to load, switch to iframe
wait = WebDriverWait(driver, 10)
frame = wait.until(EC.presence_of_element_located((By.CSS_SELECTOR, "iframe[src*=video]")))
driver.switch_to.frame(frame)
wait.until(EC.presence_of_element_located((By.CSS_SELECTOR, ".controls")))

# get the page source
page_source = driver.page_source

driver.close()

# parse the HTML
soup = BeautifulSoup(page_source, "html.parser")
script = soup.find_all("script")
print(script)

使用BeautifulSoup获取“View Element”代码而不是“View Source”代码

1 个答案: