I am totally new to script writing and am trying to get the Shifting Features code to work from ArcPy Café. I can't see what I am doing wrong.
That's my fault. Move the function above the call to the function and it should work. I edited my post above.
Also, just a note about your script, you set a value of 100 for x and y shift, and then set both to None in the function definition. So, I would not expect any shift to be observed as it is.
You need to actually call the shift_features function. As it is, the script executes line 1, then executes line 3, then stops. Everything between 'def' and 'return' is a function just waiting to be called. Your script should look like this:
import arcpy in_features = r"C:/Temp/CP_C06.shp" x_shift = 20 # may as well shift by some number y_shift = 50 # ditto def shift_features(in_features, x_shift, y_shift): with arcpy.da_UpdateCursor(in_features, ['SHAPE@XY']) as cursor: for row in cursor: cursor.updateRow([[row[0][0] + (x_shift or 0), row[0][1] + (y_shift or 0)]]) return shift_features(in_features, x_shift, y_shift)
Also, please read "Posting Code Blocks in the New GeoNet" so we can copy/paste your code to help.
Using PythonWin gives me the following error.
NameError: name 'shift_features' is not defined. Below is the code that I used.
import arcpy
in_features = r"C:/Temp/CP_C06.shp"x_shift = 100y_shift = 100shift_features(in_features, x-shift, y_shift)
def shift_features (in_features, x_shift=None, y_shift=None):
with arcpy.da.UpdateCursor(in_features, ['SHAPE@XY']) as cursor: for row in cursor: cursor.updateRow([[row[0][0] + (x_shift or 0), row[0][1] + (y_shift or 0)]])
return
That totally did the trick. Thanks for helping the newbie.
nice...Darren...although it would be wise to recommend that users experiment on a temporary file or use copyfeatures_management to clone an existing one prior to doing anything with shape geometry...a bad change in geometry can render a file useless
Hi Darren. What if I want to pull the x-shift value and y-shift value from a field in my shapefile instead of putting a value into the code sequence?
You can access field values by including them in the UpdateCursor. The list, ['SHAPE@XY','X_SHIFT','Y_SHIFT'] (change X_SHIFT and Y_SHIFT to your field names), translates to row[0], row[1], and row[2], respectively.
import arcpy in_features = r"C:/Temp/CP_C06.shp" def shift_features(in_features): with arcpy.da_UpdateCursor(in_features, ['SHAPE@XY','X_SHIFT','Y_SHIFT']) as cursor: for row in cursor: cursor.updateRow([[row[0][0] + (row[1] or 0), row[0][1] + (row[2] or 0)]]) return shift_features(in_features)
Sorry, I am just not getting it. I have two fields. One is called x_shift and one is called y_shift. Both float fields. Each currently have a value of 200. I keep getting an error.
import arcpy in_features = r"C:/Temp/CP_C06.shp" def shift_features (in_features): with arcpy.da.UpdateCursor(in_features, ['SHAPE@XY','x_shift','y_shift']) as cursor: for row in cursor: cursor.updateRow([[row[0][0] + (row[1] or 0), row[0][1] + (row[2] or 0)]]) return shift_features(in_features)
EDIT
Never mind...need the error message please
Traceback (most recent call last):
File "C:\Python27\ArcGIS10.2\Lib\site-packages\pythonwin\pywin\framework\scriptutils.py", line 326, in RunScript
exec codeObject in __main__.__dict__
File "C:\Student\Script_fieldname.py", line 13, in <module>
shift_features(in_features)
File "C:\Student\Script_fieldname.py", line 9, in shift_features
cursor.updateRow([[row[0][0] + (row[1] or 0), row[0][1] + (row[2] or 0)]])
TypeError: sequence size must match size of the row
>>>
I'm working on a project that, in the past, I ran a move calculation [SHAPE].Move([fieldname],0) in arc3.3. I work in ArcGIS 10, but use the oldie for a couple of tasks. We have upgraded and now don't have the use of arc3.3 anymore. I need to find a (modern) way to shift polygon features way out of their original spatial placement and then back again. Arcpy Café "shifting features" coding looked promising, but way out of my wheelhouse. So I am here begging for help. I did some Python tutorials, but am just not getting it.
Wendy
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