def buildUi(self):

    self.buttonSubmitText  = QtWidgets.QPushButton("Enviar")

    self.textChat = QtWidgets.QLineEdit()

    self.buttonSubmitText.clicked.connect(self.onSubmitText)



 def onSubmitText(self):

    text = self.textChat.text()

    message = create_message(self.selectedUser["id"], text)

    formattedText = self._buildChatText(message)

    self.viewChat.insertHtml(formattedText)

    self.textChat.setText("")

@QtCore.pyqtSlot()
 def onSubmitText(self):

    text = self.textChat.text()

    message = create_message(self.selectedUser["id"], text)

    formattedText = self._buildChatText(message)

    self.viewChat.insertHtml(formattedText)

    self.textChat.setText("")