Threshold.py

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_Dialog(object):
    def setupUi(self, Dialog):
        Dialog.setObjectName("Dialog")
        Dialog.resize(347, 153)
        self.gridLayout = QtWidgets.QGridLayout(Dialog)
        self.gridLayout.setObjectName("gridLayout")
        self.horizontalLayout = QtWidgets.QHBoxLayout()
        self.horizontalLayout.setObjectName("horizontalLayout")
        self.label = QtWidgets.QLabel(Dialog)
        font = QtGui.QFont()
        font.setFamily("Century Gothic")
        font.setPointSize(10)
        font.setBold(True)
        font.setWeight(75)
        self.label.setFont(font)
        self.label.setObjectName("label")
        self.horizontalLayout.addWidget(self.label)
        self.doubleSpinBox = QtWidgets.QDoubleSpinBox(Dialog)
        font = QtGui.QFont()
        font.setFamily("Century Gothic")
        font.setPointSize(10)
        self.doubleSpinBox.setFont(font)
        self.doubleSpinBox.setAlignment(QtCore.Qt.AlignCenter)
        self.doubleSpinBox.setDecimals(3)
        self.doubleSpinBox.setMaximum(1.0)
        self.doubleSpinBox.setObjectName("doubleSpinBox")
        self.horizontalLayout.addWidget(self.doubleSpinBox)
        self.gridLayout.addLayout(self.horizontalLayout, 0, 0, 1, 1)
        self.horizontalLayout_2 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_2.setObjectName("horizontalLayout_2")
        self.label_2 = QtWidgets.QLabel(Dialog)
        font = QtGui.QFont()
        font.setFamily("Century Gothic")
        font.setPointSize(10)
        font.setBold(True)
        font.setWeight(75)
        self.label_2.setFont(font)
        self.label_2.setObjectName("label_2")
        self.horizontalLayout_2.addWidget(self.label_2)
        self.doubleSpinBox_2 = QtWidgets.QDoubleSpinBox(Dialog)
        font = QtGui.QFont()
        font.setFamily("Century Gothic")
        font.setPointSize(10)
        self.doubleSpinBox_2.setFont(font)
        self.doubleSpinBox_2.setAlignment(QtCore.Qt.AlignCenter)
        self.doubleSpinBox_2.setDecimals(3)
        self.doubleSpinBox_2.setMaximum(1.0)
        self.doubleSpinBox_2.setObjectName("doubleSpinBox_2")
        self.horizontalLayout_2.addWidget(self.doubleSpinBox_2)
        self.gridLayout.addLayout(self.horizontalLayout_2, 1, 0, 1, 1)
        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.gridLayout.addWidget(self.buttonBox, 2, 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", "Minimum Threshold"))
        self.label_2.setText(_translate("Dialog", "Maximum Threshold"))
        
    def onOk(self):
        th1 = str(self.doubleSpinBox.text())
        th2 = str(self.doubleSpinBox_2.text())
#        print('-------------')
        return float(th1), float(th2)
        ############