python-2.7 - 在python qt中带有线程的Qwebview

Question

我想使用多线程运行多个QWebview来抓取数据。但是不知道如何使用qwebview实现线程。在这里，我写了一些代码：

from PyQt4.QtCore import *
from PyQt4.QtGui import *
from PyQt4.QtWebKit import *
from PyQt4.QtNetwork import *
from PyQt4 import QtCore, QtGui
from lxml import etree,html
from PyQt4.QtCore import Qt
import sys



class Form(QWidget):
    def __init__(self, parent=None):
        super(Form, self).__init__(parent)
        self.setMouseTracking(True)
        vbox = QVBoxLayout()
        self.browser =  QWebView()
        self.browser.connect(self.browser,SIGNAL('loadFinished(bool)'),self.loadFinished)
        #vbox.addWidget(self.browser)
        self.browser.load(QtCore.QUrl("http://www.google.com"))
        self.browser_tabs   = QTabWidget()          
        self.browser_tabs.setTabPosition(QTabWidget.South)
        b1_tab  = QWidget() 
        d = QHBoxLayout()
        d.addWidget(self.browser)
        b1_tab.setLayout(d)
        self.browser_tabs.addTab(b1_tab,"browser0")
        vbox.addWidget(self.browser_tabs)

        self.setLayout(vbox)
    def loadFinished(self,ok):
        print ok


def main():

    app = QApplication(sys.argv)
    ex = Form()
    ex.show()
    ex.setGeometry(150, 100, 1024, 770)

    #ex.showMaximized()
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()

您可以使用选项卡小部件打开多个浏览器。

Answer 1

为您的Form类定义一个新函数。并使用thread.start_new_thread（function_name，arguments（））。

import thread

class Form(QWidget):
...
    def addNewTab(self, newUrl, tabIndex):
        new_browser = QWebView()
        new_browser.connect(self.browser,SIGNAL('loadFinished(bool)'),self.loadFinished)
        new_browser.load(QtCore.QUrl(newUrl))
        new_tab = QWidget()
        d = QHBoxLayout()
        d.addWidget(new_browser)
        new_tab.setLayout(d)
        self.browser_tabs.addTab(new_tab, "browser" + str(tabIndex))

        # Do your scraping here

def main():
    app = QApplication(sys.argv)
    ex = Form()
    ex.show()
    ex.setGeometry(150, 100, 1024, 770)

    thread.start_newThread(ex.addNewTab, (someUrl1, 1))
    thread.start_newThread(ex.addNewTab, (someUrl2, 2))
    thread.start_newThread(ex.addNewTab, (someUrl3, 3))

    sys.exit(app.exec())