Reading environment variables in ArcPy?

Question

I have a script that tries to read from the arc environment using

import arcpy
tolerance = arcpy.env.XYTolerance

as recommended here: http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//002z0000000w000000

Alas tolerance always ends up as None. Even when I set it explicity in the Environments... part of the script dialog box.

Is this a bug?

Answer 1

I have loaded up arcmap and using the built in python interpreter I ran through the commands outlined in the helpfiles you linked. It seems that the syntax is very precise, but I was able to set the tolerance and then retrieve it as a variable called tolerance using the following steps:

>>> import arcpy
>>> from arcpy import env
>>> env.workspace = 'C:\\shapefiles\\final'
>>> env.XYTolerance = 2.5
>>> tolerance = env.XYTolerance
>>> print tolerance
2.5 Unknown
>>> 

• Sideshow Bob: Ok... but how to retrieve XYTolerance from the script dialog box? Which workspace does that live in?