Adding buttons to layout

[afobeus]

Hi, I'm wondering why this code doesn't work. I expect all buttons to be placed in a row like this: But I see only white window: . My code:

    def init_ui(self):
        self.setWindowTitle("Алфавитный указатель")
        self.setGeometry(100, 100, 1000, 700)
        self.buttons_layout = QHBoxLayout()
        self.buttons = [QPushButton(chr(index)) for index in range(ord('А'), ord('Я') + 1)]
        for button in self.buttons:
            # button.clicked.connect(lambda: self.filter_data(button.text()))
            self.buttons_layout.addWidget(button)
        self.setLayout(self.buttons_layout)

My full code:

import csv
import random
import sys

from PyQt5.QtWidgets import QApplication
from PyQt5.QtWidgets import QMainWindow, QTableWidget, QTableWidgetItem,\
    QLabel, QPushButton, QHBoxLayout
from PyQt5.QtCore import QRect


class MyWidget(QMainWindow):
    def __init__(self):
        super().__init__()
        self.init_ui()
        # self.loadTable()

    def init_ui(self):
        self.setWindowTitle("Алфавитный указатель")
        self.setGeometry(100, 100, 1000, 700)
        self.buttons_layout = QHBoxLayout()
        self.buttons = [QPushButton(chr(index)) for index in range(ord('А'), ord('Я') + 1)]
        for button in self.buttons:
            # button.clicked.connect(lambda: self.filter_data(button.text()))
            self.buttons_layout.addWidget(button)
        self.setLayout(self.buttons_layout)
        # self.result_label = QLabel(self)
        # self.result_label.setGeometry(10, 660, 200, 30)
        # self.table_widget = QTableWidget(self)
        # self.table_widget.setGeometry(10, 50, 980, 600)

    # def loadTable(self, data):
    #     self.table_widget.setColumnCount(5)
    #     self.table_widget.setHorizontalHeaderLabels(["ID", "Название", "Год", "Жанр",
    #                                                  "Продолжительность"])
    #     self.table_widget.setRowCount(0)
    #     for i, row in enumerate(data):
    #         self.table_widget.setRowCount(self.table_widget.rowCount() + 1)
    #         for j, elem in enumerate(row):
    #             self.table_widget.setItem(i, j, QTableWidgetItem(elem))
    #     self.table_widget.resizeColumnsToContents()
    #
    # def filter_data(self, letter):
    #     pass


if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = MyWidget()
    ex.show()
    sys.exit(app.exec())

[JonB]

@afobeus
QMainWindows have their own layout (see docs), you should not be doing self.setLayout(...). If you are intending to use a QMainWindow you might want to look at QMainWindow.setCentralWidget(), but I'm actually wondering if you just intend to use/derive from a plain QWidget?

[afobeus]

Thanks a lot!