OrdersGuru_signer/gui/AboutDialog.py

from PyQt5.QtWidgets import QDialog
from PyQt5.QtCore import Qt
from ui.about import Ui_About


class AboutDialog(QDialog):
    def __init__(self, parent=None):
        super(AboutDialog, self).__init__(
            parent, Qt.WindowSystemMenuHint | Qt.WindowTitleHint | Qt.WindowCloseButtonHint
        )
        self.ui = Ui_About()
        self.ui.setupUi(self)

    @staticmethod
    def show_(parent=None):
        about = AboutDialog(parent)
        about.exec_()