topic How to access element in geoprocessing value object? in Python Questions

How to access element in geoprocessing value object?

TieshengWu — Tue, 24 Jan 2017 04:30:16 GMT

HI all

I am puzzled by a simple problem. I don't know how to access a point object's x and y coordinate from a arctoolbox in python script.

It can be accessed this way:

pnt=arcpy.GetParameterAsText(0).split() # c1 is a point object in arctoolbox interface
x=float(pnt[0])
y=float(pnt[1])

It's not ideal because the code will fail when the x and y are inputed in different decimal seperator, say ',' format.

So I use:

pnt=arcpy.GetParamete(0)

But what's the method to get pnt.X and pnt.Y?

FC_Basson — Sat, 11 Dec 2021 21:29:23 GMT

Then to read the geometry:

point = arcpy.GetParameter(0) 
ptGeometry = arcpy.PointGeometry(point)
x = ptGeometry.X
y = ptGeometry.Y‍‍‍‍‍‍‍‍‍‍‍‍

TieshengWu — Tue, 24 Jan 2017 09:58:02 GMT

Thank you Basson. Line 2 return: RuntimeError: Object: CreateObject cannot create geometry from inputs.

arcpy.AddMessage(type(point)) show: <type 'geoprocessing value object'>

FC_Basson — Tue, 24 Jan 2017 10:00:46 GMT

It leaves the question of how your point object is defined? Is it a string? Please provide more information on the tool.

TieshengWu — Tue, 24 Jan 2017 10:04:12 GMT

FC_Basson — Sat, 11 Dec 2021 21:29:26 GMT

point = arcpy.GetParameter(0)
coords = str(point).split(' ')
x = coords[0]
y = coords[1]
arcpy.AddMessage(x)
arcpy.AddMessage(y)‍‍‍‍‍‍

TieshengWu — Tue, 24 Jan 2017 10:49:10 GMT

The x and y will be used as float, so decimal seperator problem still exists.

FC_Basson — Tue, 24 Jan 2017 11:13:51 GMT

Your decimals should be in point notation (12.3456) and not comma notation (12,3456), then the Python code works.

TieshengWu — Tue, 24 Jan 2017 11:52:18 GMT

Than you Basson, but I am tring to write a tool not only for myself.

FC_Basson — Tue, 24 Jan 2017 12:08:27 GMT

So your issue is with the regional settings of the OS for decimal number notation. You can detect what format the user's OS is showing floats with

locale.localeconv()['decimal_point']‍‍