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I'm trying to add a part of my filename into a field that i'd created, but it comes with the following error:

Traceback (most recent call last): File "Z:\04 - Temp\Charles\NDVI_tempo\NDVI_py3.tbx#Script_NDVIpy3.py", line 50, in File "c:\program files\arcgis\pro\Resources\arcpy\arcpy\management.py", line 3019, in CalculateField raise e File "c:\program files\arcgis\pro\Resources\arcpy\arcpy\management.py", line 3016, in CalculateField retval = convertArcObjectToPythonObject(gp.CalculateField_management(*gp_fixargs((in_table, field, expression, expression_type, code_block), True))) File "c:\program files\arcgis\pro\Resources\arcpy\arcpy\geoprocessing_base.py", line 506, in return lambda *args: val(*gp_fixargs(args, True)) arcgisscripting.ExecuteError: ERROR 000539: Error running expression: test Traceback (most recent call last): File "", line 1, in NameError: name 'test' is not defined

Failed to execute (CalculateField).
Failed to execute (Script).

This is the script that i wrote:

intershp = 'Z:\\04 - Temp\\Charles\\NDVI_tempo\\NAL\\intershp.shp'

arcpy.AddField_management (intershp, "Data", "TEXT", "", "", "", "", "", "", "")

tiff_name = tiff.split("_")[0]
field_name = "{}".format(tiff_name[0:4])

arcpy.CalculateField_management (intershp, "Data", field_name, "", "")
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  • File "", line 1, in NameError: name 'test' is not defined. Where is test coming from i do not see that in the code you posted. Commented Oct 2, 2017 at 14:01
  • "test" is a part of the filename, I used "for tiff in rasters" before Commented Oct 2, 2017 at 14:04
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    intershp = r'Z:\04- you need to raw string your parameter Commented Oct 2, 2017 at 14:11
  • It still don't works, the shape haven't any problem at all, the information is from the raster file Commented Oct 2, 2017 at 14:16

1 Answer 1

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Actually I found the solution!

The expression field couldn't be 'field_name', it has to be "'" + field_name + "'"

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  • huzzah! I was seconds away posting that answer. Good work :) Here's the documentation where I found it mentioned: pro.arcgis.com/en/pro-app/tool-reference/data-management/… Commented Oct 2, 2017 at 14:36
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    it's good practice to mark your own answer with the green checkmark... better to officially answer your own question than to leave an unanswered question out there. Commented Oct 2, 2017 at 16:42
  • "You can accept your own answer in 2 days", i'll mark it! Thanks for the advice Commented Oct 2, 2017 at 17:40

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