Error with UpdateCursor: Object does not support data assignment?

RyanHowell1 — Sat, 11 Dec 2021 06:21:13 GMT

I have a field for aspect (short integer) with values ranging from 1-4. I want to have 3 additional columns: aspect2, aspect3, aspect4 that are calculated based on the aspect field (for example, if the aspect field is 2, then aspect2 = 1, aspect3 =0 and aspect4 =0).

Here is the code I have:

arcpy.AddField_management(input, 'aspect2', 'SHORT')
arcpy.AddField_management(input, 'aspect3', 'SHORT')
arcpy.AddField_management(input, 'aspect4', 'SHORT')

with arcpy.da.UpdateCursor(input, ['aspect', 'aspect2', 'aspect3', 'aspect4']) as cursor:
    for row in cursor:
        if cursor[0] == 2:
            cursor[1] = 1
            cursor[2] = 0
            cursor[3] = 0
            cursor.updateRow(row)
        elif cursor[0] == 3:
            cursor[1] = 0
            cursor[2] = 1
            cursor[3] = 0
            cursor.updateRow(row)
        elif cursor[0] == 4:
            cursor[1] = 0
            cursor[2] = 0
            cursor[3] = 1
            cursor.updateRow(row)
        else:
            cursor[1] = 0
            cursor[2] = 0
            cursor[3] = 0
            cursor.updateRow(row)‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

When I run it, I get the following error:

Traceback (most recent call last):
File "<string>", line 19, in <module>
TypeError: 'da.UpdateCursor' object does not support item assignment

I'm not sure if it's a basic syntax issue (it's very possible) or I'm not thinking about it correctly. Any ideas are greatly appreciated.

Re: Error with UpdateCursor: Object does not support data assignment?

DanPatterson_Retired — Sat, 11 Dec 2021 06:21:16 GMT

for row in cursor:
    if row[0] == 2:
        row[1] = 1
     .....‍‍‍‍

see the code example here

UpdateCursor—Data Access module | ArcGIS Desktop

Re: Error with UpdateCursor: Object does not support data assignment?

RyanHowell1 — Fri, 24 Jan 2020 19:36:30 GMT

Thanks Dan. I figured it would be something embarrassingly obvious like that. It worked great.

topic Re: Error with UpdateCursor: Object does not support data assignment? in Python Questions

Error with UpdateCursor: Object does not support data assignment?

Re: Error with UpdateCursor: Object does not support data assignment?

Re: Error with UpdateCursor: Object does not support data assignment?