刮刮谷歌财经(BeautifulSoup)

Question

我正在尝试抓取Google财经,并获取"相关股票"表,其中包含基于Chrome中网页检查器的ID"cc-table"和类"gf-table".(示例链接:https://www.google.com/finance？q = tsla)

但是当我运行.find("table")或.findAll("table")时,此表不会出现.我可以在Python的HTML内容中找到带有表格内容的JSON外观对象,但不知道如何获取它.有任何想法吗？

Answer 1

该页面使用JavaScript呈现.有几种方法可以渲染和刮擦它.

我可以用Selenium刮它.首先安装Selenium:

sudo pip3 install selenium

然后获取驱动程序https://sites.google.com/a/chromium.org/chromedriver/downloads

import bs4 as bs
from selenium import webdriver  
browser = webdriver.Chrome()
url = ("https://www.google.com/finance?q=tsla")
browser.get(url)
html_source = browser.page_source
browser.quit()
soup = bs.BeautifulSoup(html_source, "lxml")
for el in soup.find_all("table", {"id": "cc-table"}):
    print(el.get_text())

或者 PyQt5

from PyQt5.QtGui import *  
from PyQt5.QtCore import *  
from PyQt5.QtWebKit import *  
from PyQt5.QtWebKitWidgets import QWebPage
from PyQt5.QtWidgets import QApplication
import bs4 as bs
import sys

class Render(QWebPage):  
    def __init__(self, url):  
        self.app = QApplication(sys.argv)  
        QWebPage.__init__(self)  
        self.loadFinished.connect(self._loadFinished)  
        self.mainFrame().load(QUrl(url))  
        self.app.exec_()  

    def _loadFinished(self, result):  
        self.frame = self.mainFrame()  
        self.app.quit()  

url = "https://www.google.com/finance?q=tsla"
r = Render(url)  
result = r.frame.toHtml()
soup = bs.BeautifulSoup(result,'lxml')
for el in soup.find_all("table", {"id": "cc-table"}):
    print(el.get_text())

另外Dryscrape

import bs4 as bs
import dryscrape

url = "https://www.google.com/finance?q=tsla"
session = dryscrape.Session()
session.visit(url)
dsire_get = session.body()
soup = bs.BeautifulSoup(dsire_get,'lxml')
for el in soup.find_all("table", {"id": "cc-table"}):
    print(el.get_text())

所有输出:

Valuation??Company name??Price??Change??Chg %??d | m | y??Mkt Cap??TSLATesla Inc328.40-1.52-0.46%53.69BDDAIFDaimler AG72.94-1.50-2.01%76.29BFFord Motor Company11.53-0.17-1.45%45.25BGMGeneral Motors Co...36.07-0.34-0.93%53.93BRNSDFRENAULT SA EUR3.8197.000.000.00%28.69BHMCHonda Motor Co Lt...27.52-0.18-0.65%49.47BAUDVFAUDI AG NPV840.400.000.00%36.14BTMToyota Motor Corp...109.31-0.53-0.48%177.79BBAMXFBAYER MOTOREN WER...94.57-2.41-2.48%56.93BNSANYNissan Motor Co L...20.400.000.00%42.85BMMTOFMITSUBISHI MOTOR ...6.86+0.091.26%10.22B

编辑

QtWebKit在Qt 5.5上游被弃用,在5.6中被删除.

您可以切换到PyQt5.QtWebEngineWidgets