def OpenFileX(self):
    self.file, _ = QtWidgets.QFileDialog.getOpenFileName(self, 'Single File', QtCore.QDir.rootPath() , '*.csv')
    self.textBrowserMS.setText(self.fileName)
    return self.fileName

def getfileOG(self):
    filePath, _ = QtWidgets.QFileDialog.getOpenFileName(self, 'Single File', QtCore.QDir.rootPath() , '*.csv')
    self.textBrowserOG.setText(filePath)
def getfileConfig(self):
    filePath, _ = QtWidgets.QFileDialog.getOpenFileName(self, 'Single File', QtCore.QDir.rootPath() , '*.csv')
    self.textEdit_config.setText(filePath)

Import C
class analysis(QtWidgets.QMainWindow, C.Ui_Dialog):
    def __init__(self,parent=None):
        QtWidgets.QMainWindow.__init__(self, parent)
        #self.ui = C.Ui_MainWindow()
        self.setupUi(self)