关闭后无法杀死 PyQT 窗口.这需要我重新启动内核 [英] Can't Kill PyQT Window after closing it. Which requires me to restart the kernal

问题描述

我想我没有正确关闭我的 PyQT5 窗口.我正在使用与 anaconda 一起安装的 spyder (3.3.5) 来编写 pyqt5 程序.我正在使用 qt creator 设计我的 ui 文件，我使用 pyqt 包中的 loadUi 函数加载该文件.代码一切正常，直到我需要关闭它.我通过关闭按钮(右上角的 x 按钮)关闭窗口.窗口本身是关闭的，但似乎控制台(或外壳)卡住了，我不能给它进一步的命令或重新运行程序，而不必重新启动内核(完全关闭我的 IDE 并重新打开)它).

I guess that I am not closing my PyQT5 Window correctly. I am using spyder (3.3.5) which I have installed with anaconda, to program a pyqt5 program. I am using qt creator to design my ui file, which I load using the loadUi function in pyqt package. Everything works fine with the code, until I need to close it. I close the window via the close button (the x button in the top right). The window itself is closed, but it seems like the console (or shell) is stuck, and I can't give it further commands or to re run the program, without having to restart the kernel (to completely close my IDE and re opening it).

我曾尝试在互联网上寻找问题的解决方案，但似乎没有一个对我有用.包括将 IPython Console > Graphics 更改为自动.

I have tried looking for solutions to the problem in the internet, but none seems to work for me. Including changing the IPython Console > Graphics to automatic.

还创建了一个问题:https://github.com/spyder-ide/spyder/issues/9991

import sys
from PyQt5 import QtWidgets,uic
from PyQt5.QtWidgets import QMainWindow
class Mic_Analysis(QMainWindow):
    def __init__(self):
        QMainWindow.__init__(self)
        self.ui=uic.loadUi("qt_test.ui",self)
...
if __name__ == "__main__":
    def  run_app():
        if not QtWidgets.QApplication.instance():        
            app = QtWidgets.QApplication(sys.argv)
        else:
            app=QtWidgets.QApplication.instance()
        mainWin=Mic_Analysis()
        mainWin.show()
        app.exec_()
    run_app()  

如果有人有任何建议，我很乐意听取他们的意见.

If someone have any suggestion I would be very happy to hear them.

推荐答案

对我来说，它有助于删除app.exec_()"命令.但是在运行代码时它会立即关闭.为了保持窗口打开，我需要将 MainWindow 实例返回到全局范围(或​​使其成为全局对象).我的代码如下所示:

For me, it helped to remove the 'app.exec_()' command. But then it closes immediatly when running the code. To keep the window open, I needed to return the MainWindow instance to the global scope (or make it a global object). My code looks like this:

from PyQt5 import QtWidgets
import sys

def main():
    if not QtWidgets.QApplication.instance():
        app = QtWidgets.QApplication(sys.argv)
    else:
        app = QtWidgets.QApplication.instance()
    main = MainWindow()
    main.show()

    return main

if __name__ == '__main__':         
    m = main()

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