Tworzenie GUI za pomocą PyQt

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import sys
from PyQt5.QtWidgets import (
  QApplication,
  QWidget,
  QPushButton,
  QVBoxLayout,
  QHBoxLayout,
  QTextEdit,
)
from PyQt5.QtGui import (
  QPainter,
  QBrush,
  QColor,
  QFont,
)
from PyQt5.QtCore import (
  Qt,
)


class MainWindow(QWidget, object):

  def __init__(self, parent=None):

    super(MainWindow, self).__init__(parent)

    self.setWindowTitle('A sample app')

    self.button = QPushButton("Click me!", self)
    self.button.clicked.connect(self.after_click)

    self.textEdit = QTextEdit()

    self.mainLayout = QHBoxLayout(self)
    self.leftLayout = QVBoxLayout()
    self.leftLayout.addWidget(self.button)
    self.leftLayout.addWidget(self.textEdit)
    self.rightLayout = QVBoxLayout()

    self.mainLayout.addLayout(self.leftLayout, 3)
    self.mainLayout.addLayout(self.rightLayout, 3)

  def after_click(self):
    pass


def main():
  app = QApplication(sys.argv)
  w = MainWindow()
  w.show()
  return app.exec()

if __name__ == '__main__':
  main()