topic Re: Relative Paths in Python? in Geoprocessing Questions

Relative Paths in Python?

JordanHoaglund — Tue, 04 May 2010 21:30:02 GMT

This is probably a pretty basic question, but how do you set relative paths in Python?

The script sits in a folder called SDE. It is run from a toolbox also located in the SDE folder. It needs to recognize data within folders that are also located in the SDE folder (horizontal to the script in the directory tree). Any Suggestions? I've tried just about every combination of ../ and ./ in front of filepaths in the script to no avail. Maybe it's not that easy??

Thanks,
-Jordan

Re: Relative Paths in Python?

JasonScheirer — Wed, 05 May 2010 04:17:49 GMT

Unfortunately, this is quite difficult to accomplish in 9.3.1, but in 10.0 you can use the __file__ global in script tools to determine the folder a script is running in. The same __file__ global can be used in script tools in 9.3.1, but only if the script is marked to run out of process (in the properties dialog).

The recipe you'd use is:

os.path.join(os.path.dirname(__file__), "my_sde.sde")

Re: Relative Paths in Python?

JordanHoaglund — Wed, 05 May 2010 14:33:12 GMT

Thanks,

I think I found something that works pretty easily from

http://www.faqs.org/docs/diveintopython/regression_path.html

import sys, os

print 'sys.argv[0] =', sys.argv[0]
pathname = os.path.dirname(sys.argv[0])
print 'path =', pathname
print 'full path =', os.path.abspath(pathname)

I modified it in my script to just include;

pathname = os.path.dirname(sys.argv[0])

And then when I defined my local variables I went with;

VariableName = pathname + "/Folder/File"

-Jordan

Re: Relative Paths in Python?

DaleHoneycutt — Thu, 13 May 2010 17:24:17 GMT

See the ArcGIS help topic Techniques for sharing Python scripts

The first section "Finding data relative to the script location" shows you how to do this...