如何在python PYQt4中保存幾個QtextEdits的文本？

Question

能否請你幫我解決這個問題，因爲我是一個蟒蛇PyQt的初學者...我已經創建了蟒蛇PyQt4的一個簡單的應用程序爲一個簡單的數學計算，其結果在textEdit2和textEdit3每一件事，當我點擊了罰款在計算按鈕，值出現在上述textedits ...我想要的是節省相同的文字結果，以便下一次編輯時，我打開應用程序和打開數據文件我發現在地方的每一件事情。我創建了保存和打開動作......但它保存在同一文本編輯所有的結果..

我附上我的代碼，並與結果需要被保存在主窗口和再出手拯救後在一個文本編輯打開的應用程序，並且所有的結果

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

，如果我明白你的問題正確，因爲你正在編寫文本編輯值，以便一個文件，你需要讀取線打開時值線該文件的，而不是讀取使用讀（）方法在整個文件內容。所以openFile（）方法應該是這樣的：

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() 

希望它有幫助！

UPDATE：

也改變saveFile的（）方法象下面這樣：

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()