topic Re: GetCellValue error: invalid literal for float() in Python Questions

GetCellValue error: invalid literal for float()

Anonymous User — Sat, 16 Jan 2016 22:26:42 GMT

I'm trying to Get Raster Cell Value iterating a row selection over a point feature class and passing the coordinates as a string like this "1590388,53 4881616,56". But i receive this error:

Traceback (most recent call last):

File "C:\Users\ivn\Desktop\sir\getcellval.py", line 7, in <module>

Val = float(CellVal.getOutput(0))

ValueError: invalid literal for float(): 3,5872333

This is the script:

import arcpy

rs = arcpy.GetParameterAsText(0) #Input Raster

X_Y = arcpy.GetParameterAsText(1) #Coordinates of point

CellVal = arcpy.GetCellValue_management(rs, X_Y, "1")

Val = float(CellVal.getOutput(0))

Re: GetCellValue error: invalid literal for float()

DanPatterson_Retired — Sat, 16 Jan 2016 22:39:27 GMT

Get Cell Value—Help | ArcGIS for Desktop

shows using int and it appears it is using local formatting. have you had issues with the internationalization of decimal formating in the past with the spatial analyst functions.

import arcpy

result = arcpy.GetCellValue_management("C:/data/rgb.img", "480785 3807335", "2;3")

cellSize = int(result.getOutput(0))

print(cellSize)

Re: GetCellValue error: invalid literal for float()

Anonymous User — Sat, 16 Jan 2016 22:57:21 GMT

I receive this error for int:

>>> Val = int(CellVal.getOutput(0))

Runtime error

Traceback (most recent call last):

File "<string>", line 1, in <module>

ValueError: invalid literal for int() with base 10: '3,5872333'

Re: GetCellValue error: invalid literal for float()

DanPatterson_Retired — Sat, 16 Jan 2016 23:07:28 GMT

did you just try printing it out, before doing any conversion? It would be nice to see if it is even convertable to an integer or a string. for example, you can search for ValueError invalid literal for int() as an error message. There are lots of possiblities depending on what your print statement returns.

For example arcgis desktop - What does ValueError: invalid literal for int() with base 10 indicate? - Geographic Information Systems…

Re: GetCellValue error: invalid literal for float()

NeilAyres — Mon, 18 Jan 2016 06:45:13 GMT

Are you sure that the point XY as typed in, is within the extent of the raster?

Re: GetCellValue error: invalid literal for float()

XanderBakker — Mon, 18 Jan 2016 13:27:00 GMT

This sounds like a case of regional settings. Your result (as a string) contains a comma as decimal (regional settings), but Python will need a point to be able to convert it to float.

Try this:

Val = float(CellVal.getOutput(0).replace(',','.'))

Re: GetCellValue error: invalid literal for float()

DanPatterson_Retired — Wed, 20 Jan 2016 05:57:03 GMT

22.2. locale — Internationalization services — Python 2.7.11 documentation

It is possible to internationalize if more than a quick substitution is needed for the decimal delimiter. The web is aghast with examples .... most use the old replace approach unless you have to do this all the time