How to read data from file and display in QEditText box in QT

i would like to read a line of data from text file 开发者_StackOverflow社区and display that data in Text Edit box

It's quite simple, actually:

import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *


FILENAME = 'textedit_example.py'


class Form(QDialog):
    def __init__(self, parent=None):
        super(Form, self).__init__(parent)
        self.edit = QTextEdit()
        layout = QVBoxLayout()
        layout.addWidget(self.edit)
        self.setLayout(layout)

        self.edit.setText("No file found")

        with open(FILENAME) as f:
            self.edit.setText(f.readline())


app = QApplication(sys.argv)
form = Form()
form.show()
app.exec_()

Some notes:

1. Save it as 'textedit_example.py' and run. You'll see the first line of the source in the text box (import sys)
2. It requires Python 2.6 and latest PyQt4 to run

You may interest to look at this tutorial

Simple Text Viewer Example