我试图刮取网页上出现的所有项目的名称,但默认情况下只有18个项目在页面上可见&我的代码只抓取这些项目。您可以通过单击“ShowAll”按钮查看所有项目,但该按钮使用的是Javascript。在
经过一些研究,我发现PyQt模块可以用来解决这个涉及javascript按钮的问题&我使用了它,但仍然无法调用“on click”事件。参考代码如下:
import csv
import urllib2
import sys
import time
from bs4 import BeautifulSoup
from PyQt4.QtGui import *
from PyQt4.QtCore import *
from PyQt4.QtWebKit import *
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 = 'http://www.att.com/shop/wireless/devices/smartphones.html'
r = Render(url)
jsClick = var evObj = document.createEvent('MouseEvents');
evObj.initEvent('click', true, true );
this.dispatchEvent(evObj);
allSelector = "a#deviceShowAllLink" # This is the css selector you actually need
allButton = r.frame.documentElement().findFirst(allSelector)
allButton.evaluateJavaScript(jsClick)
page = allButton
soup = BeautifulSoup(page)
soup.prettify()
with open('Smartphones_26decv1.0.csv', 'wb') as csvfile:
spamwriter = csv.writer(csvfile, delimiter=',')
spamwriter.writerow(["Date","Day of Week","Device Name","Price"])
items = soup.findAll('a', {"class": "clickStreamSingleItem"},text=True)
prices = soup.findAll('div', {"class": "listGrid-price"})
for item, price in zip(items, prices):
textcontent = u' '.join(price.stripped_strings)
if textcontent:
spamwriter.writerow([time.strftime("%Y-%m-%d"),time.strftime("%A") ,unicode(item.string).encode('utf8').strip(),textcontent])
我在这方面面临的错误如下:
^{pr2}$有人能帮我调用这个“onclick”事件,这样我就可以为所有人收集数据了吗物品。什么我的无知,因为我是编程新手。在
这会有帮助吗。。?在
要单击该按钮,必须在对象上调用
evaluateJavascript
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