QCoreApplication没有优雅地终止
QCoreApplication没有优雅地终止
提问于 2018-10-03 12:18:25
我是PyQt5新手。我编写了一个简单的CLI脚本，该脚本发出GET请求，打印结果，然后退出时出现错误："QWaitCondition:在线程仍在等待时销毁“
我做错了什么？我的代码如下所示：
from PyQt5.QtCore import QCoreApplication, QObject, QUrl
from PyQt5.QtNetwork import QNetworkRequest, QNetworkAccessManager, QNetworkReply
import sys
class MainWindow(QObject):
def __init__(self):
super().__init__()
target = "http://pyqt.sourceforge.net/Docs/PyQt5/index.html"
request = QNetworkRequest(QUrl(target))
self.networkAccessManager = QNetworkAccessManager()
#self.networkAccessManager.finished[QNetworkReply].connect(self.headsUp)
self.networkAccessManager.finished.connect(self.onFinished)
self.networkAccessManager.get(request)
def onFinished(self, response): #response is an object of type QNetworkReply
error = response.error()
if (error == QNetworkReply.NoError):
result = response.readAll()
print(response.header(QNetworkRequest.ContentTypeHeader))
print(response.header(QNetworkRequest.LastModifiedHeader))
print(response.header(QNetworkRequest.ContentLengthHeader))
else:
print("There was an error. "+response.errorString())
self.windUp(response)
def windUp(self, replyObject): #replyObject is an object of type QNetworkReply
print("Done")
replyObject.deleteLater()
QCoreApplication.quit()
if __name__ == '__main__':
qApp = QCoreApplication(sys.argv)
w = MainWindow()
sys.exit(qApp.exec_())回答 1
Stack Overflow用户
回答已采纳
发布于 2018-10-03 13:09:01
当我运行您的代码时，我不会收到任何错误，只会得到一个空的答案。
text/html
None
0
Done而且它是正确的，因为在那个url中没有任何内容，因为如果您使用一个浏览器，我们将看到它将我们重定向到另一个url：https://sourceforge.net/projects/pyqt/，因此为了启用重定向，将分析reply的RedirectionTargetAttribute属性。
import sys
from PyQt5 import QtCore, QtNetwork
class MainWindow(QtCore.QObject):
def __init__(self):
super().__init__()
target = "http://pyqt.sourceforge.net"
self.manager = QtNetwork.QNetworkAccessManager(self)
self.manager.finished.connect(self.on_finished)
self.start_request(target)
def start_request(self, url):
request = QtNetwork.QNetworkRequest(QtCore.QUrl(url))
self.manager.get(request)
@QtCore.pyqtSlot(QtNetwork.QNetworkReply)
def on_finished(self, reply):
redirection_target = reply.attribute(QtNetwork.QNetworkRequest.RedirectionTargetAttribute)
if reply.error():
print("There was an error. {}".format(response.errorString()))
elif redirection_target is not None:
reply.deleteLater()
print("redirection_target: {}".format(redirection_target))
self.start_request(redirection_target)
else:
print(reply.header(QtNetwork.QNetworkRequest.ContentTypeHeader))
print(reply.header(QtNetwork.QNetworkRequest.LastModifiedHeader))
print(reply.header(QtNetwork.QNetworkRequest.ContentLengthHeader))
print(reply.readAll())
reply.deleteLater()
QtCore.QCoreApplication.quit()
if __name__ == '__main__':
app = QtCore.QCoreApplication(sys.argv)
w = MainWindow()
sys.exit(app.exec_())输出：
redirection_target: PyQt5.QtCore.QUrl('https://sourceforge.net/projects/pyqt/')
text/html; charset=utf-8
None
None
b'<!doctype html>\n<!-- Server: sfs-consume-8 -->\n<html class="no-js" lang="en">\n <head>\n <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><script type="text/...页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/52626888
复制相关文章
相似问题
腾讯云开发者
Copyright © 2013 - 2026 Tencent Cloud. All Rights Reserved. 腾讯云 版权所有
深圳市腾讯计算机系统有限公司 ICP备案/许可证号：粤B2-20090059 
粤公网安备44030502008569号
腾讯云计算（北京）有限责任公司 京ICP证150476号 | 京ICP备11018762号