Python PyQt图像捕获错误

我正在尝试使用PyQt转到url集并捕获这些快照，对于一个url，代码运行良好：

#!/usr/bin/env python
import sys, itertools
import signal
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from PyQt4.QtWebKit import QWebPage

urls = "http://www.gouvernement.fr/", "http://www.google.com/"
outputs = "output1.png", "output2.png"
 #for url in urls: #and output in ouputs:
for url, output in itertools.izip(urls, outputs):

    def onLoadFinished(result):
    if not result:
        print "Request failed"
        sys.exit(1)

    # Set the size of the (virtual) browser window
    webpage.setViewportSize(webpage.mainFrame().contentsSize())

    # Paint this frame into an image
    image = QImage(webpage.viewportSize(), QImage.Format_ARGB32)
    painter = QPainter(image)
    webpage.mainFrame().render(painter)
    painter.end()
    image.save(output)
    print ".png image successfully saved"
    #sys.exit(0)


    app = QApplication(sys.argv)
    signal.signal(signal.SIGINT, signal.SIG_DFL)

    webpage = QWebPage()
    webpage.connect(webpage, SIGNAL("loadFinished(bool)"), onLoadFinished)
    webpage.mainFrame().load(QUrl(url))
    sys.exit(app.exec_())

---

但是，当它通过一个快照时，它只是挂起，不继续下一个快照。这是为什么？

粘贴的代码的缩进并不能清楚地表明您的

for

循环走了多远-我想每次都会一直到循环结束

如果是这样，那么代码不起作用的原因就很清楚了：你调用

app.exec\uu

，它将一直阻止，直到最后一个窗口关闭，或者你调用

quit

或

exit

。就像你从来没有做过的那样，它会永远阻塞

如果希望以这种方式处理多个url，则应使用事件处理程序保存页面并加载下一个url。像这样的方法应该会奏效：

#!/usr/bin/env python
import sys, itertools
import signal
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from PyQt4.QtWebKit import QWebPage

urls = ["http://www.gouvernement.fr/", "http://www.google.com/"]
outputs = ["output1.png", "output2.png"]

def save_page(webpage, output):
    # Set the size of the (virtual) browser window
    webpage.setViewportSize(webpage.mainFrame().contentsSize())

    # Paint this frame into an image
    image = QImage(webpage.viewportSize(), QImage.Format_ARGB32)
    painter = QPainter(image)
    webpage.mainFrame().render(painter)
    painter.end()
    image.save(output)
    print ".png image successfully saved"
    #sys.exit(0)


app = QApplication(sys.argv)
signal.signal(signal.SIGINT, signal.SIG_DFL)

webpage = QWebPage()

def onLoadFinished(result):
    if not result:
        print "Request failed"
        sys.exit(1)
    save_page(webpage, outputs.pop(0))   # pop output name from list and save
    if urls:
        url = urls.pop(0)   # pop next url to fetch from list
        webpage.mainFrame().load(QUrl(url))
    else:
        app.quit()  # exit after last url

webpage.connect(webpage, SIGNAL("loadFinished(bool)"), onLoadFinished)
webpage.mainFrame().load(QUrl(urls.pop(0)))
sys.exit(app.exec_())

---

编写的代码无法运行，因此很难判断它的工作方式。是的，您使用缩进进行了更正，但我尝试了您的代码，它确实会在循环中递归，但python因soem原因崩溃，甚至图像也无法保存。你试过了吗？是的，我试过了。这段代码对我来说没有任何问题。好吧，它生成了图像，但仍然会使我的python在台式机和笔记本电脑上崩溃。不过我还是能拍到照片。非常奇怪，但是谢谢！