[PyQt] Size Policy, Laout and Official Documentation

[Man_from_India]

Another example is this:

from PyQt5 import QtWidgets

app = QtWidgets.QApplication([])
window = QtWidgets.QWidget()
window.setGeometry(50, 50, 500, 300)
menu_bar = QtWidgets.QMenuBar(window)
menu_bar.setGeometry(0, 0, 500, 22)
size_policy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Fixed)
menu_bar.setSizePolicy(size_policy)
menu_bar.addMenu("File")
menu_bar.addMenu("Edit")
lay = QtWidgets.QHBoxLayout()
lay.addWidget(menu_bar)
window.setLayout(lay)
window.show()
app.exec()

If we remove the QVBoxLayout the sizepolicy is not working. Strange!