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Etozeigor
Asked:2023-04-19 02:51:24 +0000 UTC2023-04-19 02:51:24 +0000 UTC

PyQt5主窗口报错崩溃后如何调用报错信息？

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我有一个PyQt5应用程序，比方说，它可能会在出现某些错误后崩溃。

我怎样才能在下面的示例代码中实现这样的结果，以便在主窗口下降后关闭，并调用一个带有错误文本和“确定”按钮的小对话框，关闭后应用程序退出app？

import sys

from PyQt5.QtWidgets import QWidget, QVBoxLayout, QMainWindow, QApplication, QPushButton


class MainWindow(QMainWindow):

    def __init__(self):
        super().__init__()
        self.central_widget = QWidget(self)
        self.setCentralWidget(self.central_widget)
        self.layout_main_window = QVBoxLayout()
        self.central_widget.setLayout(self.layout_main_window)

        self.btn_crash_programm = QPushButton('Crash')
        self.btn_crash_programm.clicked.connect(self.crash)
        self.layout_main_window.addWidget(self.btn_crash_programm)

    def crash(self):
        x = 2 / 0


if __name__ == '__main__':
    app = QApplication(sys.argv)
    app.setStyle('Fusion')
    main_window = MainWindow()
    main_window.show()
    sys.exit(app.exec_())

我打算通过将这部分代码包装在 中来实现try - except，但这不起作用，块except没有执行，主窗口关闭，应用程序继续运行并加载系统。

main_window = MainWindow()
main_window.show()
python

1 个回答

  1. Best Answer

    作为一个选项：

    import sys
from PyQt5.QtWidgets import QWidget, QVBoxLayout, QMainWindow, \
    QApplication, QPushButton, QMessageBox


class MainWindow(QMainWindow):

    def __init__(self):
        super().__init__()
        self.central_widget = QWidget(self)
        self.setCentralWidget(self.central_widget)
        self.layout_main_window = QVBoxLayout()
        self.central_widget.setLayout(self.layout_main_window)

        self.btn_crash_programm = QPushButton('Crash')
        self.btn_crash_programm.clicked.connect(self.crash)
        self.layout_main_window.addWidget(self.btn_crash_programm)

    def crash(self):
        x = 2 / 0


if __name__ == '__main__':
    import traceback                                                    # +++ 
    
    app = QApplication(sys.argv)
    app.setStyle('Fusion')
# +++ vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv    
    def excepthook(exc_type, exc_value, exc_tb):
        tb = "".join(traceback.format_exception(exc_type, exc_value, exc_tb))
        
        msg = QMessageBox.critical(
            None,
            "Error catched!:",
            tb
        )
        QApplication.quit()
    
    sys.excepthook = excepthook
# +++ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    
    main_window = MainWindow()
    main_window.show()
    sys.exit(app.exec_())

    在此处输入图像描述

    • 1

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