ArcPy Error : Can't Multiply Sequence by non-int of type 'list

Question

Hi, I am trying to execute an equation into python program considering monthly folder, but I am getting error, Below i have attached reference of the equation also, Where P and R for rasterlist1 and rasterlist2 respectively, Error message is. Traceback (most recent call last): File "", line 23, in <module> TypeError: can't multiply sequence by non-int of type 'list'‍‍‍‍‍‍‍‍‍‍‍‍ Script i am working, import arcpy, os, calendar import numpy from arcpy.sa import * arcpy.env.overwriteOutput = True arcpy.CheckOutExtension("Spatial") topWorkspace = r'D:\NPP_GUJARAT_MONSOON' ws_out = r'D:\NPP_GUJARAT_MONSOON\EVA3' arcpy.env.workspace = topWorkspace months = {calendar.month_name[i].upper(): str(i).zfill(3) for i in range(1, 13)} # Get dict of months and month number (i.e. January = 001, March = 003 etc.) # Step through list of all folders for folderPath in arcpy.ListWorkspaces(): baseName = os.path.basename(folderPath).upper() if baseName in months: # Test that subfolder is a month name monthNumber = months[baseName] # Get month-number for use in output filename arcpy.env.workspace = folderPath # list rasters (Erlier:*Max_Temper.tif, We changed it to below) rasterList1 = arcpy.ListRasters('Precipitat*.tif') rasterList2 = arcpy.ListRasters('Solar*.tif') print rasterList1, rasterList2 for ras_name in rasterList1: ras_mean = arcpy.Raster(os.path.join(folderPath, ras_name)) for ras_name in rasterList2: ras_mean = arcpy.Raster(os.path.join(folderPath, ras_name)) outCellStatistics = ((rasterList1 * rasterList2) * ((Square(rasterList1)) + (Square(rasterList2)) + rasterList1 * rasterList2)) /rasterList1 + rasterList2 * ((Square(rasterList1)) + (Square(rasterList2))) #Save the output outRasterName = os.path.join(ws_out, "EO_{}.tif".format(monthNumber)) outCellStatistics.save(outRasterName) print outRasterName #print done print 'done' ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

ShouvikJha · Answer

Dan Patterson‌, Thank you very much. Finally, I reached to the end using below Script, for ras_num in [str(i).zfill(3) for i in range(1, 13)]: ras_Prcep = getRasterFromList(ras_num, lst_ras_Prcep, ws_in_Prcep) ras_RD = getRasterFromList(ras_num, lst_ras_RD, ws_in_RD) if all([not ras_Prcep is None, not ras_RD is None]): # calculate ras_E1A = (ras_Prcep * ras_RD) * ((Square(ras_Prcep)) + (Square(ras_RD) + ras_Prcep * ras_RD)) ras_E1B = ras_Prcep + ras_RD * ((Square(ras_Prcep)) + (Square(ras_RD))) ras_AET = ras_E1A / ras_E1B # save raster out_name_AET = os.path.join(ws_out_AET, 'r{0}_AET.TIF'.format(ras_num)) ras_AET.save(out_name_AET) print out_name_AET ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

DanPatterson_Retired · Answer

Where did you update the code? I thought you just need to figure out how to multiply (aka, times) two rasters?

Did you not see the Plus and Pow(er) functions?

Provide your attempt at correcting it and any error messages you get.

Questions need to have some feedback to the answers, specifically what you tried and what worked and what didn't.

ShouvikJha · Answer

Thank you for the suggestions. Again I have updated my full code. I think multiple sequence might be possible here. Please request to all cooperate with us to solve this issue.