Change QLabel text dynamically in PyQt4

Question

My question is: how can I change the text in a label? The label is inside a layout, but setText() does not seem to work - maybe I am not doing it right.

<

Answer 1

You are not using the modules created by pyuic correctly. You should never directly edit these modules - they should imported into your main application.

The UI classes that pyuic generates have a setupUi method. This method takes an instance of the top-level class that you created in Qt Designer, and it will add all the widgets from designer to that instance. So label_nombre, for example, would become an attribute of the instance passed to setupUi. Usually, you will create a subclass of the top-level class, and then pass in self as the instance (see below).

I would suggest that you re-generate your ui files with pyuic and save them as, say dialog_ui.py and dashboard_ui.py.

The structure of your program would then become something like this:

from PyQt4 import QtCore, QtGui
from dashboard_ui import Ui_dashboard
from dialog_ui import Ui_Dialog

class logica_login(QtGui.QDialog, Ui_Dialog):
    def __init__(self):
        QtGui.QDialog.__init__(self)
        self.setupUi(self)
        self.bloguin_aceptar.clicked.connect(self.validacion)
        self.blogin_cancelar.clicked.connect(self.reject)

    def validacion(self):
        ...

class logica_tablero(QtGui.QMainWindow, Ui_dashboard):
    def __init__(self):
        QtGui.QMainWindow.__init__(self)
        self.setupUi(self)
        self.label_nombre.setText("hola")
        ...

if __name__ == "__main__":

    app = QtGui.QApplication(sys.argv)
    login = logica_login()
    if login.exec_() == QtGui.QDialog.Accepted:
        dashboard = logica_tablero()
        dashboard.showMaximized()
        sys.exit(app.exec_())

Answer 2

Replace this line in logica_tablero:

self.ui.self.label_nombre.setText("hola")

with this:

self.ui.label_nombre.setText("hola")