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I want to be able to set the value of a field to Null using python, but I get an error. I am using arcpy.CalculateField_management

Any help would be appreciated.

Rob Smith

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Can you provide a sample of your code and the error message? – Brian May 9 at 15:42
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You do not say what your data format is. If your source dataset is a shapefile then you cannot set the field to Null as dBase format does not support it. – Hornbydd May 9 at 16:31

1 Answer

up vote 2 down vote

Not using field-calculator, you can use UpdateCursor and setNull. (Arcgis for 10.1)

a quick example:

rows = arcpy.UpdateCursor(fc, sql, etc...)
for row in rows:
    row.SetNull("FIELD")
rows.updateRow(row)
del rows
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