如何在 python PYQt4 中保存多个 QtextEdits 的文本？

Question

你能帮我解决这个问题吗，因为我是 python PyQt 初学者...我用 python PyQt4 创建了一个简单的应用程序，用于简单的数学计算并得到结果在 textEdit2 和 textEdit3 中，当我单击计算按钮时，一切都很好，值出现在上面的文本编辑中......我想要的是将结果保存在相同的文本编辑中，以便下次我打开应用程序并打开数据文件我发现一切都到位了。我创建了保存和打开操作...但它会将所有结果保存在同一个文本编辑中...

我附上了我的代码和主要 window 以及需要保存的结果和保存并打开应用程序后的另一张照片，并将所有结果放在一个文本编辑器中

enter code here
import sys  
from PyQt4 import QtCore, QtGui, uic   
import os   #os used to interface with windows  
import datetime as dt
import pickle
qtCreatorFile = "save.ui" # Enter ui file here

Ui_MainWindow, QtBaseClass = uic.loadUiType(qtCreatorFile)   

class MyApp(QtGui.QMainWindow, Ui_MainWindow):  
    def __init__(self):                         

        super (MyApp,self).__init__()       
        Ui_MainWindow.__init__(self)
        self.setupUi(self)
        self.initUI()
        self.calc.clicked.connect(self.Bss)

    def Bss (self):
        x = float(self.textEdit.toPlainText())     
        y = float(self.textEdit1.toPlainText())
        z= x+y
        w= x**2

        z_string = str(z)         #convert z value to a string then add this  string to textEdit and set as Text
        self.textEdit2.setText(z_string)
        w_string = str(w)
        self.textEdit3.setText(w_string)

    def initUI(self):           #QAction class insert New,action save in the main menue bar
        newAction = QtGui.QAction('New', self)  
        newAction.setShortcut('Ctrl+N')
        newAction.setStatusTip('Create new file')
        newAction.triggered.connect(self.newFile)  
        saveAction = QtGui.QAction('Save as', self)
        saveAction.setShortcut('Ctrl+S')
        saveAction.setStatusTip('Save current file')
        saveAction.triggered.connect(self.saveFile)
        openAction = QtGui.QAction('Open', self)
        openAction.setShortcut('Ctrl+O')
        openAction.setStatusTip('Open a file')
        openAction.triggered.connect(self.openFile)
        closeAction = QtGui.QAction('Close', self)
        closeAction.setShortcut('Ctrl+Q')
        closeAction.setStatusTip('Close Notepad')
        closeAction.triggered.connect(self.close)
        menubar = self.menuBar()
        fileMenu = menubar.addMenu('&File')
        fileMenu.addAction(newAction)
        fileMenu.addAction(saveAction)
        fileMenu.addAction(openAction)
        fileMenu.addAction(closeAction)
        self.show()
        self.statusBar()

    def newFile(self): #create a new function and remove all values in the QTEXTedit
        self.textEdit.clear()
        self.textEdit1.clear()
        self.textEdit2.clear()
        self.textEdit3.clear()                

    def openFile(self):
        self.text = QtGui.QTextEdit(self)
        filename = QtGui.QFileDialog.getOpenFileName(self, 'Open File', os.getenv('HOME'))
        f = open(filename, 'r')
        filedata = f.read()
        self.textEdit1.setText(filedata)
        self.textEdit2.setText(filedata)
        self.textEdit3.setText(filedata)
        f.close()
        self.show()

    def saveFile(self):   # saving argument values in a filedata
        self.text = QtGui.QTextEdit(self)
        filename = QtGui.QFileDialog.getSaveFileName(self, 'Save File', os.getenv('HOME'))
        f = open(filename, 'w')
        filedata = self.textEdit1.toPlainText()
        f.write(filedata)
        filedata = self.textEdit2.toPlainText()
        f.write(filedata)
        filedata = self.textEdit3.toPlainText()
        f.write(filedata)
        f.close()

    def closeEvent(self, event):
        reply = QtGui.QMessageBox.question(self, 'Message',
        "Are you sure to quit?", QtGui.QMessageBox.Yes | 
        QtGui.QMessageBox.No, QtGui.QMessageBox.No)

        if reply == QtGui.QMessageBox.Yes:
            event.accept()
        else:
            event.ignore()
if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)
    window = MyApp()
    window.show()
    sys.exit(app.exec_())

Answer 1

如果我正确理解你的问题，因为你正在按顺序将 textEdit 值写入文件，你需要在打开文件时逐行读取该值，而不是使用 [= 读取整个文件内容20=]read() 方法。所以 openFile() 方法应该是这样的：

def openFile(self):
    self.text = QtGui.QTextEdit(self)
    filename = QtGui.QFileDialog.getOpenFileName(self, 'Open File', os.getenv('HOME'))
    count = 0
    with open(filename,'r') as f:
        for line in f:
            count = count + 1
            if count == 1 : self.textEdit1.setText(line)
            elif count == 2 : self.textEdit2.setText(line)
            elif count == 3 : self.textEdit3.setText(line)
            else: break
    self.show()

希望对您有所帮助！

更新：

也像下面这样更改 saveFile() 方法：

def saveFile(self):   # saving argument values in a filedata
    self.text = QtGui.QTextEdit(self)
    filename = QtGui.QFileDialog.getSaveFileName(self, 'Save File', os.getenv('HOME'))
    f = open(filename, 'w')
    filedata = self.textEdit1.toPlainText()
    filedata = str(filedata)+"\n"
    f.write(filedata)
    filedata = self.textEdit2.toPlainText()
    filedata = str(filedata)+"\n"
    f.write(filedata)
    filedata = self.textEdit3.toPlainText()
    filedata = str(filedata)+"\n"
    f.write(filedata)
    f.close()

如何在 python PYQt4 中保存多个 QtextEdits 的文本？

How to save Text of several QtextEdits within python PYQt4?

save

qtextedit