from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QVBoxLayout, QGridLayout, QLabel
import sys

class ColorConverter():

    @staticmethod
    def rgb_to_cmyk(self, rgb):
        pass

class MainWindow(QWidget):
    def __init__(self, parent=None):
        super().__init__(parent)

        self.interface()

    def interface(self):
        lfsr_btn = QPushButton("&LFSR", self)
        exit_btn = QPushButton("&Wyjście", self)

        # lfsr_btn.clicked.connect(self.start_lfsr)

        box_layout = QVBoxLayout()

        box_layout.addWidget(lfsr_btn)
        box_layout.addWidget(exit_btn)

        grid_layout = QGridLayout()
        grid_layout.addWidget(QLabel("Wybierz, co chcesz uczynić", self), 0, 0)
        grid_layout.addLayout(box_layout, 1, 0)

        self.setLayout(grid_layout)

        self.setGeometry(20, 20, 500, 300)
        self.setWindowTitle("Generatory")

def main():
    app = QApplication(sys.argv)
    window = MainWindow()
    window.show()
    # input()
    sys.exit(app.exec_())


if __name__ == '__main__':
    main()