pyqt4 how to set text from line edit to label on button click - python-3.x

Question

I am trying to design data input form that will add text to a label when the text is entered into a line edit widget when the ok button is pressed, but the answer is completely eluding me:
#!/usr/bin/python3
#-*- coding: utf-8 -*-
"""
Set label text from line edit with
ok click
"""
import sys
from PyQt4 import QtGui, QtCore
class Example(QtGui.QMainWindow):
def __init__(self):
super(Example, self).__init__()
self.initUI()
def initUI(self):
self.qle = QtGui.QLineEdit(self)
self.qle.move(100, 0)
sometext = self.qle.text
self.lbl = QtGui.QLabel(self)
self.lbl.move(100, 100)
btn = QtGui.QPushButton("Ok", self)
btn.move(30, 100)
btn.clicked.connect(self.buttonClicked)
self.setGeometry(200, 200, 300, 200)
self.show
def buttonClicked(self, sometext):
sender = self.sender()
self.lbl.setText(sometext)
def main():
app = QtGui.QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
How do you get this to work please?

Answer 1

You can use this to set text to a label: QLabel.setText("string text")
Combined with: QPushButton.clicked.connect(lambda: func())
And get the text in the Line Edit: QLineEdit.text()
So complete code should look something like:
#!/usr/bin/python3
#-*- coding: utf-8 -*-
"""
Set label text from line edit with
ok click
"""
import sys
from PyQt4 import QtGui, QtCore
class Example(QtGui.QMainWindow):
def __init__(self):
super(Example, self).__init__()
self.initUI()
def initUI(self):
self.qle = QtGui.QLineEdit(self)
self.qle.move(100, 0)
sometext = self.qle.text
self.lbl = QtGui.QLabel(self)
self.lbl.move(100, 100)
btn = QtGui.QPushButton("Ok", self)
btn.move(30, 100)
self.setGeometry(200, 200, 300, 200)
self.show
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
ex = Example()
def setLabelText():
text = qle.text()
ex.lbl.setText(text)
ex.btn.clicked.connect(lambda: setLabelText())
sys.exit(app.exec_())
I can't actually test this code, but it should work fine.
Tell me if you have any problems, and please give us a traceback.
You might also want to consider moving to PyQt5.6 (Slightly older than the newest, but it has the QtDesigner built in. A quick google search should find you the right executable installer, it's not on their website anymore. If you can't find it I can send it to you.)
Hope it works, and wish you luck!
Edit:
I just thought of a simpler way. Should have just said this.
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
ex = Example()
ex.btn.clicked.connect(lambda: ex.lbl.setText(qle.text()))
sys.exit(app.exec_())

Answer 2

A bit of a simplified answer. Did some edits to your code. It works fine, and runs successfully.
import sys
from PyQt4 import QtGui, QtCore
class Example(QtGui.QMainWindow):
def __init__(self):
super(Example, self).__init__()
self.initUI()
def initUI(self):
self.qle = QtGui.QLineEdit(self)
self.qle.move(10, 10)
self.lbl = QtGui.QLabel(self)
self.lbl.setGeometry(10, 55,200,20)
self.lbl.setText("Type Something and Press Ok!")
btn = QtGui.QPushButton("Ok", self)
btn.move(10, 100)
btn.clicked.connect(self.buttonClicked)
self.setGeometry(200, 200, 300, 200)
self.show
def buttonClicked(self):
sender = self.sender()
self.lbl.setText(self.qle.text())
def main():
app = QtGui.QApplication(sys.argv)
ex = Example()
ex.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
Also you QLabel was invisible because it was out of your QMainWindow area.
Hope it Helps!