How to align a button in pyqt5?

Question

Python

I need to align the button to the bottom left. I tried to do this for the test:
self.verticalLayout.addWidget(button, alignment=QtCore.Qt.AlignRight)

But writes AttributeError: 'main' object has no attribute 'verticalLayout'

This is how I create the class: class main(QWidget):

Answer 1

In order to use the self.verticalLayout attribute, you must first assign it the value of a Layout object from PyQt.
self.name is an attribute of your class, only instead of name, verticalLayout.

from PyQt5 import QtWidgets, QtCore


class WindowLayout(object):
    def __init__(self):
        button = QtWidgets.QWidget
        self.verticalLayout = QtWidgets.QVBoxLayout(parent)
        self.verticalLayout.addWidget(button, alignment=QtCore.Qt.AlignRight)

parent - the widget object to which the Layout belongs, if there is one, for example TabMenu
If not, then no need to specify