topic Re: Can't change points from attribute in Python Questions

Can't change points from attribute

Anonymous User — Thu, 17 Nov 2016 14:41:55 GMT

HI all - Currently I'm getting:

Runtime error
Traceback (most recent call last):
File "<string>", line 14, in <module>
AttributeError: 'module' object has no attribute 'updateCursor'

from the following code:

# Move points based up current lat/lon
#grab stuff you need
import arcpy, os
#filepath
filepath = r"C:\Users\joanna.grossman\AppData\Roaming\ESRI\Desktop10.4\ArcCatalog\AGR_SecureProd__AGR_Admin.sde"
#get feature class, feidds
fc = "GDB_AGR_SECURE.AGR_ADMIN.ApiariesWGS_20160927"
lat = "Latitude"
lon = "Longtitude"
#create curser on fc
cursor = arcpy.da.updateCursor(fc, ["SHAPE@XY"])
row = cursor.next()
#get points
pnt = arcpy.Point()
while row:
   x = row.getValue(lon)
   y = row.getValue(lat)
   xy = (x,y)
   #pnt = arcpy.Point(xy)
   #pnt_geometry = arcpy.PointGeometry(pnt)
   print x
   print xy
   #print(pnt_geometry.getGeohash(6))
   #row.shape = pnt
   cursor.updateRow([xy])
   row = cursor.next()

I'm a total Python/arcpy noob. Would really appreciate your feedback.

Re: Can't change points from attribute

MitchHolley1 — Thu, 17 Nov 2016 15:19:36 GMT

Capitalize the 'u'.

cursor = arcpy.da.UpdateCursor(fc, ["field"])

Re: Can't change points from attribute

BlakeTerhune — Thu, 17 Nov 2016 16:11:50 GMT

I think Mitch Holley‌ has identified the issue causing the error you posted. Here's the documentation for UpdateCursor. However, I think you will have some additional issues with how you're using the UpdateCursor. Check out the code samples in the help documentation for some guidance.

Also, Posting code with Syntax Highlighting on GeoNet

Re: Can't change points from attribute

Anonymous User — Thu, 17 Nov 2016 18:30:54 GMT

wow. Thanks!

Re: Can't change points from attribute

JoshuaBixby — Thu, 17 Nov 2016 18:38:01 GMT

Blake is spot on. You are mixing the usage patterns of the old cursors and newer Data Access cursors. Specifically, getValue() doesn't apply with the newer Data Access cursors.

Re: Can't change points from attribute

Anonymous User — Thu, 17 Nov 2016 18:42:26 GMT

okay. I'm learning things! So the way to get a value now is to grab it from a stack of fields?

Re: Can't change points from attribute

MitchHolley1 — Thu, 17 Nov 2016 19:21:44 GMT

Yeah, if you're trying to update geometries based on a Lat and Long field. It would look something like this:

Re: Can't change points from attribute

Anonymous User — Sat, 11 Dec 2021 09:04:35 GMT

I don't have to create a point or anything?

Like any of this...

pnt = arcpy.Point(xy)
pnt_geometry = arcpy.PointGeometry(pnt)‍‍

Re: Can't change points from attribute

JoshuaBixby — Thu, 17 Nov 2016 19:31:41 GMT

I encourage you to read Accessing data using cursors. Mitch is using "tokens" to access the spatial object. The tokens are a form of shortcut/optimization that can be used to simplify working with geometry objects in data tables.

Re: Can't change points from attribute

Anonymous User — Thu, 17 Nov 2016 19:43:57 GMT

will do - thank you!