PyArgument List

Just some context: I have created two stand-alone plugins based on the code of the QGIS-Plugin-builder. For these I would like to create one menu from which you can then select one plugin to run it. Based on this discussion Handling multiple QGIS Plugins in one custom menu and code snippet I managed to create to create a new menu-point in the qgis tool bar ('LK-tools') with a submenu 'Reformat to LK-names'.

I'm creating a plugin to calculate NDVI and NDWI indices in QGIS v3.36.2. I have successfully created the GUI as below and successfully loaded the layers and bands of the layers. The data I am using is multiband landsat 8 data. The select input file using QgsMapLayerComboBox and the select band using QgsRasterBandComboBox. I use the signal when the input file changes, the select band will also change as shown below.

i tried write excel file using openpyxl module.