捕捉QApplication中引发的异常

捕捉QApplication中引发的异常

您必须使用该异常，并且如果希望事件循环结束，则必须调用

quit()

（或

exit()

）方法。

import sysimport tracebackfrom PyQt5 import QtWidgets, QtGui, QtCoreclass ErrorApp:    # ...    def raise_error(self):        assert Falsedef excepthook(exc_type, exc_value, exc_tb):    tb = "".join(traceback.format_exception(exc_type, exc_value, exc_tb))    print("error catched!:")    print("error message:n", tb)    QtWidgets.QApplication.quit()    # or QtWidgets.QApplication.exit(0)sys.excepthook = excepthooke = ErrorApp()ret = e.app.exec_()print("event loop exited")sys.exit(ret)

输出：

error catched!:error message: Traceback (most recent call last):  File "main.py", line 28, in raise_error    assert FalseAssertionErrorevent loop exited