我写了一个小型python代码来在网页中刮取表格。它使用qt4来刮擦。现在,问题是我需要每5分钟不停地抓取数据。我正在考虑刷新页面并再次刷新。我如何刷新网页并每隔5分钟再刮一次? 下面是我用来刮擦的代码。python qt4:重新刷新并再次刷新
import sys
from BeautifulSoup import BeautifulSoup
from PyQt4.QtGui import *
from PyQt4.QtCore import *
from PyQt4.QtWebKit import *
from lxml import html
import redis
from time import sleep
class Scraper(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_()
#self.render = Scraper(url)
def _loadFinished(self, result):
self.frame = self.mainFrame()
self.app.quit()
def close_app(self):
self.app.quit()
print "closed"
url = 'https://www.nseindia.com/live_market/dynaContent/live_analysis/top_gainers_losers.htm?cat=G'
r = Scraper(url)
result = r.frame.toHtml()
formatted_result = str(result.toAscii())
soup = BeautifulSoup(formatted_result)
table = soup.find(id="topGainers")
print table