topic Edit Session for Update Cursor? in Python Questions

Edit Session for Update Cursor?

JoeBorgione — Sat, 11 Dec 2021 18:58:36 GMT

ArcMap 10.5.1

In Problems with an Update Cursor I noted that I received an error upon running an update cursor on a table view. I just ran it again and got:

Runtime error
Traceback (most recent call last):
File "<string>", line 10, in <module>
RuntimeError: The operation is not supported within an edit session.

    with arcpy.da.UpdateCursor('ba_view',fields)as updatecursor:
        for row in updatecursor:   # this is line 10 the error refers to....‍‍

I suspect my lack of experience with update cursors is the root cause; I ran it in an edit session in ArcMap to get the error. I don't get the error outside of an edit session.

For some reason, I thought update cursors needed to be run in an edit session: is that not the case?

Joshua Bixby‌

Re: Edit Session for Update Cursor?

JoshuaBixby — Mon, 27 Aug 2018 14:53:20 GMT

Are you starting the edit session with ArcPy?

Re: Edit Session for Update Cursor?

DanPatterson_Retired — Mon, 27 Aug 2018 14:55:30 GMT

UpdateCursor—Data Access module | ArcGIS Desktop

perhaps you are overgeneralizing this note

Note:
Opening simultaneous insert or update operations on the same workspace using different cursors requires the start of an edit session.

Re: Edit Session for Update Cursor?

JoeBorgione — Mon, 27 Aug 2018 14:59:33 GMT

No. I open it in the ArcMap Session and run the update cursor code in the python window.