创建快捷键不成功大家帮看看是怎么回事 [复制链接]

代码很简单，大家帮忙看下啦，多谢谢啊
我创建了一个文本编辑框，然后自定义了一个pop弹出菜单，想在这个菜单上创建快捷键，不成功。。。


import math, random, sys
import re
from PyQt4.QtCore import *
from PyQt4.QtGui import *

            
from PyQt4 import QtCore

class Test2(QWidget):
    def __init__(self, parent = None):
        super(Test2, self).__init__(parent)
        self.edit = QTextEdit()
        self.m = None
        self.edit.setContextMenuPolicy(Qt.CustomContextMenu)
        self.bt = QPushButton()
        vbox = QVBoxLayout()
        vbox.addWidget(self.edit)
        vbox.addWidget(self.bt)
        self.setLayout(vbox)
        self.setVisible(True)
        self.doc = self.edit.document()
        self.txtcursor = QTextCursor(self.doc)        
        self.connect(self.edit, SIGNAL("selectionChanged()"), self.out)
        self.connect(self.bt, SIGNAL("clicked()"), self.clear)
        self.connect(self.edit, SIGNAL("customContextMenuRequested(QPoint)"), self.addMenu)
        #self.txtcursor.select(QTextCursor.WordUnderCursor)
        self.format = QTextCharFormat()
        self.format.setForeground(Qt.blue)
        self.m = QMenu()

        a = self.m.addAction("print", self, SLOT(self.pr()), QKeySequence("CTRL+E"))
        a.setShortcut(QKeySequence("Ctrl+P"))
        self.connect(a, SIGNAL("triggered()"), self.pr)
        
    def addMenu(self):
        self.m.exec(QCursor.pos())
        
    def pr(self):
        print("print ok")
        
    def out(self):
        print("anchor = ", self.txtcursor.anchor())
        print("selectstart= ")
        print(self.txtcursor.selectionStart())
        print(self.txtcursor.selectionEnd())
        print(self.doc.characterCount())
        
        str = self.edit.textCursor().selectedText()
        if (len(str)):
            print(str)


            
    def clear(self):
        list = (1, 2)
        
        self.txtcursor.clearSelection()

    
if __name__ == "__main__":
    app = QApplication(sys.argv)
    test = Test2()
    sys.exit(app.exec_())