Hist_window.py

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_Dialog(object):

    def setupUi(self, Dialog):
        Dialog.setObjectName("Dialog")
        Dialog.resize(347, 136)
        self.gridLayout = QtWidgets.QGridLayout(Dialog)
        self.gridLayout.setObjectName("gridLayout")
        self.verticalLayout = QtWidgets.QVBoxLayout()
        self.verticalLayout.setObjectName("verticalLayout")
        self.horizontalLayout = QtWidgets.QHBoxLayout()
        self.horizontalLayout.setObjectName("horizontalLayout")
        self.label = QtWidgets.QLabel(Dialog)
        font = QtGui.QFont()
        font.setFamily("Century Gothic")
        font.setPointSize(12)
        font.setBold(True)
        font.setWeight(75)
        self.label.setFont(font)
        self.label.setObjectName("label")
        self.horizontalLayout.addWidget(self.label)
        self.spinBox = QtWidgets.QSpinBox(Dialog)
        font = QtGui.QFont()
        font.setPointSize(12)
        self.spinBox.setFont(font)
        self.spinBox.setMinimum(3)
        self.spinBox.setSingleStep(2)
        self.spinBox.setObjectName("spinBox")
        self.horizontalLayout.addWidget(self.spinBox)
        self.verticalLayout.addLayout(self.horizontalLayout)
        self.buttonBox = QtWidgets.QDialogButtonBox(Dialog)
        self.buttonBox.setOrientation(QtCore.Qt.Horizontal)
        self.buttonBox.setStandardButtons(QtWidgets.QDialogButtonBox.Cancel|QtWidgets.QDialogButtonBox.Ok)
        self.buttonBox.setObjectName("buttonBox")
        self.verticalLayout.addWidget(self.buttonBox)
        self.gridLayout.addLayout(self.verticalLayout, 0, 0, 1, 1)

        self.retranslateUi(Dialog)
        self.buttonBox.accepted.connect(Dialog.accept)
        self.buttonBox.rejected.connect(Dialog.reject)
        QtCore.QMetaObject.connectSlotsByName(Dialog)

    def retranslateUi(self, Dialog):
        _translate = QtCore.QCoreApplication.translate
        Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
        self.label.setText(_translate("Dialog", "Window size for Hysteresis"))
        

    def onOk(self):
        ws = str(self.spinBox.text())
#        print('---------------')
        return int(ws)

#
#if __name__ == "__main__":
#
#    import sys
#    app = QtWidgets.QApplication(sys.argv)
#    Dialog = QtWidgets.QDialog()
#    ui = Ui_Dialog()
#    ui.setupUi(Dialog)
#    Dialog.show()
#    ui.onOk()
#    sys.exit(app.exec_())