鉴于 QT 的异步特性,QtWebkit 方法也是非阻塞的,因此在线程中运行它们毫无意义。您可以像这样并行启动它们:
from functools import partial
from PySide.QtCore import QUrl
from PySide.QtGui import QApplication
from PySide.QtWebKit import QWebView, QWebSettings
TARGET_URLS = (
'http://stackoverflow.com',
'http://github.com',
'http://bitbucket.org',
'http://news.ycombinator.com',
'http://slashdot.org',
'http://www.reddit.com',
'http://www.dzone.com',
'http://www.ideone.com',
'http://jsfiddle.net',
)
class Crawler(object):
def __init__(self, app):
self.app = app
self.results = dict()
self.browsers = dict()
def _load_finished(self, browser_id, ok):
print ok, browser_id
web_view, _flag = self.browsers[browser_id]
self.browsers[browser_id] = (web_view, True)
frame = web_view.page().mainFrame()
self.results[frame.url()] = frame.toHtml()
web_view.loadFinished.disconnect()
web_view.stop()
if all([closed for bid, closed in self.browsers.values()]):
print 'all finished'
self.app.quit()
def start(self, urls):
for browser_id, url in enumerate(urls):
web_view = QWebView()
web_view.settings().setAttribute(QWebSettings.AutoLoadImages,
False)
loaded = partial(self._load_finished, browser_id)
web_view.loadFinished.connect(loaded)
web_view.load(QUrl(url))
self.browsers[browser_id] = (web_view, False)
if __name__ == '__main__':
app = QApplication([])
crawler = Crawler(app)
crawler.start(TARGET_URLS)
app.exec_()
print 'got:', crawler.results.keys()