def initialize_background(self, background=None,
                              offset=0, slope=0, quad=0):
        if background is None:
            return
        if background not in VALID_BKGS:
            print(self.invalid_bkg_msg % (repr(background),
                                          ', '.join(VALID_BKGS)))

        self.add_param('bkg_offset', value=offset, vary=True)
        if background.startswith('line'):
            self.add_param('bkg_slope', value=slope, vary=True)
        elif background.startswith('quad'):
            self.add_param('bkg_slope', value=slope, vary=True)
            self.add_param('bkg_quad', value=slope, vary=True)
Creates the form is not created or focuses it if it was
dataset/ETHPy150Open xraypy/xraylarch/plugins/math/fitpeak.py/FitModel.initialize_background--crossover with--dataset/ETHPy150Open EiNSTeiN-/idapython/Scripts/ImportExportViewer.py/ImpExpForm_t.Show