Qt标准键在Python中停止工作

枚举QKeySequence::StandardKey

此枚举表示标准密钥绑定。

http://doc.qt.io/qt-5/qkeysequence.html#StandardKey-enum

试试看:

import sys
from PyQt5.QtGui     import *
from PyQt5.QtCore    import *
from PyQt5.QtWidgets import *

class MyButton(QMainWindow):              
    def __init__(self,parent=None):
        super().__init__(parent)

        btn1 = QPushButton("Click or `Ctrl+Q`", clicked=self.close)
        btn1.setShortcut(QKeySequence("Ctrl+Q"))
        
        btn2    = QPushButton("QKeySequence.Close", 
                              clicked=lambda: print("\n Please Press -> Ctrl+W"))
        quitAct = QAction("Close", btn2, triggered=self.close)
        quitAct.setShortcuts(QKeySequence.Close)                     # <<<=======
        btn2.addAction(quitAct)
        
        btn3 = QPushButton("Click or `Ctrl+P`", clicked=lambda: print("Hello Kajsa"))
        btn3.setShortcut(QKeySequence("Ctrl+P"))
        
        centralWidget = QWidget()
        self.setCentralWidget(centralWidget)        
        v_layout = QVBoxLayout(centralWidget)
        v_layout.addWidget(btn1)
        v_layout.addWidget(btn2)
        v_layout.addWidget(btn3)

if __name__ == '__main__':
    app=QApplication([])
    mb = MyButton()
    mb.show()
    app.exec_()

import sys
from PyQt5.QtGui     import *
from PyQt5.QtCore    import *
from PyQt5.QtWidgets import *

class demo_widget(QWidget):
    def __init__(self,parent=None):
        super().__init__(parent)
        lay_content = QVBoxLayout()
        self.closeBtn = QPushButton("Close")
        self.lineEdit = QLineEdit()

        self.closeBtn.clicked.connect(self.slt_close)
        self.closeAction = QAction(self, triggered=self.slt_close)
        self.closeAction.setShortcuts([QKeySequence("Ctrl+Q"), QKeySequence("Ctrl+W")])
        self.closeBtn.addAction(self.closeAction)

        lay_content.addWidget(self.closeBtn)
        lay_content.addWidget(self.lineEdit)
        self.setLayout(lay_content)

    def slt_close(self):
        self.lineEdit.setText("close")

if __name__ == '__main__':
    app=QApplication([])
    demo = demo_widget()
    demo.show()
    app.exec_()