Refresh QMainWindow with different QMainWindow in Pyqt4 - python-3.x

Question

I need your help to solve this problem, I want to refresh a QlistWidget in pyqt4 when I add a new register from another QMainWindow not in the principal, i tried with "repaint()" but it doesn´t work, to understand it better I post the code
This is the main window where I added all items from a DB
class Psicologo(QMainWindow):
def __init__(self, parent=None):
super(Psicologo, self).__init__(parent)
uic.loadUi('inicio.ui', self)
self.button_volver.clicked.connect(self.regresar)
self.button_nvo_psicologo.clicked.connect(self.nuevoPsicologo)
query = "SELECT * FROM user"
cursor, conexion = CreateConexion()
cursor.execute(query)
registro = cursor.fetchall()
for i in registro:
self.lista_psicologos.addItem(i[1]+" "+i[2]+" "+i[3])
def regresar(self):
self.parent().show()
self.close()
def nuevoPsicologo(self):
self.hide()
nuevo_form = AltaPsico(self)
nuevo_form.show()
And here is the other window where I create a new register
class AltaPsico(QMainWindow):
def __init__(self, parent=None):
super(AltaPsico, self).__init__(parent)
uic.loadUi('alta_paciente.ui', self)
self.combo_sexo.hide()
self.label_12.hide()
self.text_comentario.hide()
self.label_14.hide()
self.line_correo_2.hide()
self.label_13.hide()
self.button_volver.clicked.connect(self.regresar)
self.button_guardar.clicked.connect(self.guardar)
self.button_eliminar.hide()
def guardar(self):
nombre = self.line_nombre.text()
app = self.line_app.text()
apm = self.line_apm.text()
domicilio = self.line_domicilio.text()
edad = self.line_edad.text()
telefono = self.line_telefono.text()
especialidad = self.line_especialidad.text()
correo = self.line_correo.text()
usuario = self.line_usuario.text()
password = self.line_password.text()
pass2 = self.line_password_2.text()
if password == pass2:
if edad.isdigit():
if validate_email(correo):
if telefono.isdigit():
query = "INSERT INTO user(idUser, Nombre, ApPaterno, ApMaterno, Domicilio, Edad, Telefono, Especialidad, Correo, Usuario, Password, Tipo) VALUES (0,'"+nombre+"','"+app+"', '"+apm+"', '"+domicilio+"', '"+edad+"', '"+telefono+"', '"+especialidad+"', '"+correo+"', '"+usuario+"', '"+password+"', 2);"
print (query)
cursor, conexion = CreateConexion()
cursor.execute(query)
msgBoxCancel = QtGui.QMessageBox( self )
msgBoxCancel.setIcon( QtGui.QMessageBox.Information )
msgBoxCancel.setText( "Usuario registrado con exito" )
msgBoxCancel.addButton( QtGui.QMessageBox.Ok )
msgBoxCancel.exec_()
conexion.commit()
conexion.close()
self.parent().show()
self.QMainWindow.update()
self.close()
else:
msgBoxCancel = QtGui.QMessageBox( self )
msgBoxCancel.setIcon( QtGui.QMessageBox.Information )
msgBoxCancel.setText( "¡Telefono invalido, ingrese telefono valido!" )
msgBoxCancel.addButton( QtGui.QMessageBox.Ok )
msgBoxCancel.exec_()
else:
msgBoxCancel = QtGui.QMessageBox( self )
msgBoxCancel.setIcon( QtGui.QMessageBox.Information )
msgBoxCancel.setText( "¡Correo invalido, ingrese correo valido!" )
msgBoxCancel.addButton( QtGui.QMessageBox.Ok )
msgBoxCancel.exec_()
else:
msgBoxCancel = QtGui.QMessageBox( self )
msgBoxCancel.setIcon( QtGui.QMessageBox.Information )
msgBoxCancel.setText( "¡Ingrese una edad valida!" )
msgBoxCancel.addButton( QtGui.QMessageBox.Ok )
msgBoxCancel.exec_()
else:
msgBoxCancel = QtGui.QMessageBox( self )
msgBoxCancel.setIcon( QtGui.QMessageBox.Information )
msgBoxCancel.setText( "¡La contraseña no coincide, intentelo de nuevo!" )
msgBoxCancel.addButton( QtGui.QMessageBox.Ok )
msgBoxCancel.exec_()
def regresar(self):
self.parent().repaint()
self.parent().show()
self.close()
When the register ends succesfully this window closes automatically but when the principal shows again the listWidget shows the same registers at the begin.
I hope this community can help me, i´ve been searching about this topic but i can´t find anything.

Answer 1

If the database is modified, the GUI is not notified so the data must be requested again:
class Psicologo(QMainWindow):
def __init__(self, parent=None):
super(Psicologo, self).__init__(parent)
uic.loadUi('inicio.ui', self)
self.button_volver.clicked.connect(self.regresar)
self.button_nvo_psicologo.clicked.connect(self.nuevoPsicologo)
self.load_from_db()
def load_from_db(self):
self.lista_psicologos.clear()
query = "SELECT * FROM user"
cursor, conexion = CreateConexion()
cursor.execute(query)
registro = cursor.fetchall()
for i in registro:
self.lista_psicologos.addItem("{} {} {}".format(i[1], i[2], i[3]))
def regresar(self):
self.parent().show()
self.close()
def nuevoPsicologo(self):
self.hide()
nuevo_form = AltaPsico(self)
nuevo_form.show()
def guardar(self):
# ...
conexion.commit()
conexion.close()
self.parent().show()
self.parent().load_from_db()