Hi all,
I consistently have an issue where I am running long loops for raster
processing that crash after 100 iterations or so. Typically the error is a
ValueError where "ValueError: the environment variable is longer than 32767
bytes"
This has happened when running scripts in the GUI and when using the
grass_session package. A sketch of my loop is as follows:
def doSomething(x):
user = Session()
user.open(gisdb=mygisdb, location=mylocation, mapset=mymapset,
create_opts='')
v.surf_idw(....)
r.out_gdal(...)
user.close()
def main():
monthlist = list of dates
for month in monthlist:
doSomething(month)
if __name__ == "__main__":
sys.exit(main())
So I'm opening and closing a session in each loop, which I hoped would take
care of memory Issues I may run into.
I'm using 7.6.1 on a 64-Bit Windows 7. The full error is
Traceback (most recent call last):
File "D:\TreasureValley\waterbudget\riparian\et_interpolate_refet.py", line
82, in <module>
sys.exit(main())
File "D:\TreasureValley\waterbudget\riparian\et_interpolate_refet.py", line
79, in main
makeETrSurface(ts)
File "D:\TreasureValley\waterbudget\riparian\et_interpolate_refet.py", line
30, in doSomething
user = Session()
File "D:\OSGEO4~1\apps\Python27\lib\site-packages\grass_session\session.py",
line 244, in __init__
self.env = set_grass_path_env(gisbase=self.gisbase, env=self.env)
File "D:\OSGEO4~1\apps\Python27\lib\site-packages\grass_session\session.py",
line 102, in set_grass_path_env
env['PATH'] += os.pathsep + os.path.join(gisbase, 'extrabin')
File "D:\OSGEO4~1\apps\Python27\lib\os.py", line 422, in __setitem__
putenv(key, item)
ValueError: the environment variable is longer than 32767 bytes
Any ideas of how to prevent the ValueError? Perhaps some arguments when calling
Session?
Thanks as always,
Alex
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