matchbox-keyboard | Matchbox-keyboard | Keyboard library

import sys
import os
from PyQt5.QtWidgets import QApplication, QFileDialog, QSlider, QComboBox, QCheckBox, QWidget, QMainWindow, QPushButton, QLabel, QGridLayout, QGroupBox, QRadioButton, QMessageBox, QLineEdit
from PyQt5.QtGui import QIcon, QPixmap
from PyQt5.QtCore import pyqtSlot, Qt


class App(QMainWindow):
    def __init__(self):
        super().__init__()
        self.title = 'GUI TESTS'
        self.left = 0
        self.top = 0
        self.width = 800
        self.height = 400
        self.statusBarMessage = "GUI TEST"
        self.currentSprite = 'TEST.png'
        self.btn1Active = False
        self.btn2Active = False
        self.btn3Active = False
        self.btn4Active = False
        self.btn5Active = False
        self.btn6Active = False
        self.btn7Active = False
        self.btn8Active = False
        self.saveLocationDir = ""
        self.initUI()

    def initUI(self):
        self.setWindowTitle(self.title)
        self.setGeometry(self.left, self.top, self.width, self.height)
        self.statusBar().showMessage(self.statusBarMessage)

        self.userNameLabel = QLabel(self)
        self.userNameLabel.move(0,125)
        self.userNameLabel.setText("What is your name?")
        self.userNameLabel.resize(120,20)

        self.nameInput = QLineEdit(self)
        self.nameInput.move(0,145)
        self.nameInput.resize(200,32)
        self.nameInput.setEchoMode(0)
        self.nameInput.mousePressEvent=self.showKeyboard

    @pyqtSlot()
    def showKeyboard(self,event):
        if event.button() == QtCore.Qt.LeftButton:
            QtWidgets.QLineEdit.mousePressEvent(self, event)
            command = "matchbox-keyboard"
            os.system(command)