Simple python query: properly setting up arcpy.env.workspace and defining datasets

Question

I'm creating a python script (for the first time in quite a long time). And the basics are confusing me a little. With the below code I keep getting the error:

"ERROR 000732: Input Table: Dataset /MARCHNET does not exist or is not supported Failed to execute (AddField)."

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In the "OK" folder there is a shapefile named MARCHNET and it is also currently open in an instance in ArcMap.

• ChrisL: you should try: PmsNet = "MARCHNET.shp"

Answer 1

You forgot to mention the extension.

If you are working with shapfiles in a workspace you always have to add the '.shp', such as here:

PmsNet = r'MARCHNET.shp'

You can work with the name alone only if your workspace is a geodatabase, as feature classes in a geodatabase do not have file extensions.