created as part of a proximity analysis to make use of the output of the "generate near table tool". only after this was complete did I realize that a vlookup would do this pretty easily... i think.

lookup_floc_by_objectid.py

projected_fc = "joined"
new_field = "nearby_FLOC"
floc_id_field = "FLOC_ID"

# Add a new field
arcpy.management.AddField(projected_fc, new_field, "TEXT")

# Step 1: Create a dictionary to map OBJECTID to FLOC_ID
floc_id_dict = {}
with arcpy.da.SearchCursor(projected_fc, ["OBJECTID", floc_id_field]) as search_cursor:
    for row in search_cursor:
        floc_id_dict[row[0]] = row[1]

# Step 2: Update the 'FLOC' field using the dictionary
with arcpy.da.UpdateCursor(projected_fc, [new_field, "NEAR_FID"]) as update_cursor:
    for row in update_cursor:
        near_fid = row[1]
        floc_value = floc_id_dict.get(near_fid, None)  # Get the FLOC_ID value based on NEAR_FID
        if floc_value is not None:
            row[0] = floc_value  # Update the FLOC field
        update_cursor.updateRow(row)