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from PySide2.QtGui import QAction
from PySide2.QtWidgets import (QApplication, QMainWindow, QMenu,
                               QPlainTextEdit, QSessionManager)


//! [0]
class MainWindow(QMainWindow):
    def __init__(self, parent=None):
        self.textEdit = QPlainTextEdit()
        self.curFile = ""
        # ...

    def loadFile(self, fileName):
        pass

    def closeEvent(self, event):
        pass

    def newFile(self):
        pass

    def open(self):
        pass

    def save(self):
        pass

    def saveAs(self):
        pass

    def about(self):
        pass

    def documentWasModified(self):
        pass
    # Enable this only if QT_NO_SESSIONMANAGER is not defined
    # def commitData(self):
    #   pass

    def createActions(self):
        pass

    def createStatusBar(self):
        pass

    def readSettings(self):
        pass

    def writeSettings(self):
        pass

    def maybeSave(self):
        pass

    def saveFile(self, fileName):
        pass

    def setCurrentFile(self, fileName):
        pass

    def strippedName(self, fullFileName):
        pass
//! [0]