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I am trying to join a csv file to a shapefile using a unique field and a python script. Then I want to append one of the fields from the csv file to the shapefile and remove the join.

Is there a way to do this without creating a new "output" shapefile? The shapefile that I am working with is a very large shapefile in a .gdb and copying all of its information to a new shapefile, deleting the old shapefile, and moving the copied information back to the original location would be non-ideal.

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  • Add a new (blank) field to the shapefile
  • Join the csv to the shapefile
  • Field-calculate the values from the appropriate csv field to the newly created shapefile field
  • Remove the join
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