PyQt5 -- 显示对话框

Question

First, you have to close the existing window otherwise it will not allow an opening new window or close the entire program. How can I do this in the Python library PyQt5.

Answer 1

To show a dialog in PyQt, you can use

error_dialog = QMessageBox()
error_dialog.setWindowTitle("Your title")
error_dialog.setText("Your message")
error_dialog.exec()