[GRASS-user] grass-user Digest, Vol 107, Issue 9

Rob Parsons jrobparsons at gmail.com
Sat Mar 7 11:14:59 PST 2015


Thanks for the help.

I do not have a use case. I am learning GRASS 7.0, on Windows 7 platform,
by going through all the online documentation, Python script examples, and
PyGRASS examples. I will eventually get into the source code.

I hope it is OK to use this forum for learning help?

Rob Parsons
Raleigh NC



On Fri, Mar 6, 2015 at 9:46 PM, Anna Petrášová <kratochanna at gmail.com>
wrote:

>
>
> On Fri, Mar 6, 2015 at 8:45 PM, Rob Parsons <jrobparsons at gmail.com> wrote:
>
>> I converted the interactive script at the top of this page,
>>
>> http://grass.osgeo.org/grass70/manuals/libpython/script.html
>>
>> to a batch script.
>>
>> I understand what the script is trying to do. When I File -> "Launch
>> script" from the "Layer Manager" GUI, the script appears to run to
>> completion, but, this message is displayed on the "Command console":
>>
>>  "ERROR: Unable to create file
>> <C:\grassdata/North_Carolina/user1/.tmp/unknown/4808.1>"
>>
>> I have traced it to this statement in the script:
>>
>> map2d_2.read("map2d_1")
>>
>> The file was indeed created.
>>
>> C:\grassdata\North_Carolina\user1\.tmp\unknown>dir
>>  Volume in drive C is OS
>>  Volume Serial Number is C4D0-A091
>>
>>  Directory of C:\grassdata\North_Carolina\user1\.tmp\unknown
>>
>> 2015-03-06  08:25 PM    <DIR>          .
>> 2015-03-06  08:25 PM    <DIR>          ..
>> 2015-03-06  08:25 PM               192 4808.0
>> 2015-03-06  08:25 PM               192 4808.1
>> 2015-03-06  08:25 PM               576 4808.2
>>                3 File(s)            960 bytes
>>                2 Dir(s)  22,857,420,800 bytes free
>>
>> C:\grassdata\North_Carolina\user1\.tmp\unknown>
>>
>> The script prints out the 2D and 3D arrays.
>>
>> The 2D rasters (map2d_1 and map2d_2) are written to the 'user1' mapset
>> but not the 3D rasters (map3d_1 and map3d_2).
>>
>> Has anyone successfully run this example?
>>
>
> It seems it got broken very recently, I created a ticket for that (
> http://trac.osgeo.org/grass/ticket/2616). Do you need to use this
> library? There is also newer library PyGRASS (
> http://grass.osgeo.org/grass70/manuals/libpython/pygrass_raster.html), it
> has more capabilities, so you might want to use that anyway. Perhaps if you
> would share what is your usecase, people may have some advice.
>
> Anna
>
>>
>>
>> Rob Parsons
>> Raleigh NC
>>
>>
>>
>>
>>
>> On Thu, Mar 5, 2015 at 10:42 PM, Rob Parsons <jrobparsons at gmail.com>
>> wrote:
>>
>>> Yes.
>>> I do get the "add the script path to GRASS_ADDON_PATH" prompt. After I
>>> say 'yes' to the prompt, the script runs successfully.
>>> Thanks!
>>>
>>>
>>> On Thu, Mar 5, 2015 at 1:14 PM, <grass-user-request at lists.osgeo.org>
>>> wrote:
>>>
>>>> Send grass-user mailing list submissions to
>>>>         grass-user at lists.osgeo.org
>>>>
>>>> To subscribe or unsubscribe via the World Wide Web, visit
>>>>         http://lists.osgeo.org/mailman/listinfo/grass-user
>>>> or, via email, send a message with subject or body 'help' to
>>>>         grass-user-request at lists.osgeo.org
>>>>
>>>> You can reach the person managing the list at
>>>>         grass-user-owner at lists.osgeo.org
>>>>
>>>> When replying, please edit your Subject line so it is more specific
>>>> than "Re: Contents of grass-user digest..."
>>>>
>>>>
>>>> Today's Topics:
>>>>
>>>>    1. Re: grass-user Digest, Vol 107, Issue 2 (Anna Petr??ov?)
>>>>
>>>>
>>>> ----------------------------------------------------------------------
>>>>
>>>> Message: 1
>>>> Date: Thu, 5 Mar 2015 13:14:05 -0500
>>>> From: Anna Petr??ov? <kratochanna at gmail.com>
>>>> To: Rob Parsons <jrobparsons at gmail.com>
>>>> Cc: GRASS user list <grass-user at lists.osgeo.org>
>>>> Subject: Re: [GRASS-user] grass-user Digest, Vol 107, Issue 2
>>>> Message-ID:
>>>>         <CAE0EDEro0wnTAaLkgmwsvpZcUckXvXmzBUMcOv4J5qwW=
>>>> qRZPg at mail.gmail.com>
>>>> Content-Type: text/plain; charset="utf-8"
>>>>
>>>> On Wed, Mar 4, 2015 at 10:09 PM, Rob Parsons <jrobparsons at gmail.com>
>>>> wrote:
>>>>
>>>> > Thanks for the direction!
>>>> >
>>>> > I have successfully worked through the examples on
>>>> > http://grass.osgeo.org/grass70/manuals/libpython/script_intro.html
>>>> except
>>>> > for the last one about adding a module interface to a script. I
>>>> copied the
>>>> > code into a python file named module_interface.py. After I File->
>>>> "Launch
>>>> > script" and select module_interface.py, the module GUI pops up and
>>>> prompts
>>>> > for the raster inputs and output. But, after clicking on "Run", the
>>>> script
>>>> > reports the following message:
>>>> >
>>>> >
>>>> Before the module dialog opens, you should get a dialog asking to add
>>>> the
>>>> script path to GRASS_ADDON_PATH. If you do it, you should be able to run
>>>> the script. Did you get this dialog?
>>>>
>>>> Anna
>>>>
>>>> (Wed Mar 04 21:55:29
>>>> > 2015)
>>>> > module_interface araster=el_D782_6m at PERMANENT
>>>> braster=el_D783_6m at PERMANENT
>>>> > output=el_r_6m
>>>> > 'module_interface' is not recognized as an internal or
>>>> > external command,
>>>> > operable program or batch file.
>>>> > (Wed Mar 04 21:55:29 2015) Command finished (0
>>>> > sec)
>>>> >
>>>> > Anyone seen this message?
>>>> >
>>>> > Rob Parsons
>>>> > Raleigh NC
>>>> >
>>>> >
>>>> >
>>>> > On Sun, Mar 1, 2015 at 8:13 PM, <grass-user-request at lists.osgeo.org>
>>>> > wrote:
>>>> >
>>>> >> Send grass-user mailing list submissions to
>>>> >>         grass-user at lists.osgeo.org
>>>> >>
>>>> >> To subscribe or unsubscribe via the World Wide Web, visit
>>>> >>         http://lists.osgeo.org/mailman/listinfo/grass-user
>>>> >> or, via email, send a message with subject or body 'help' to
>>>> >>         grass-user-request at lists.osgeo.org
>>>> >>
>>>> >> You can reach the person managing the list at
>>>> >>         grass-user-owner at lists.osgeo.org
>>>> >>
>>>> >> When replying, please edit your Subject line so it is more specific
>>>> >> than "Re: Contents of grass-user digest..."
>>>> >>
>>>> >>
>>>> >> Today's Topics:
>>>> >>
>>>> >>    1. GRASS 7.0 Running Scripts (.\GRASS GIS 7.0.0\scripts)
>>>> >>       (Rob Parsons)
>>>> >>    2. Re: GRASS 7.0 Running Scripts (.\GRASS GIS
>>>> 7.0.0\scripts)
>>>> >>       (Vaclav Petras)
>>>> >>
>>>> >>
>>>> >>
>>>> ----------------------------------------------------------------------
>>>> >>
>>>> >> Message: 1
>>>> >> Date: Sun, 1 Mar 2015 19:37:59 -0500
>>>> >> From: Rob Parsons <jrobparsons at gmail.com>
>>>> >> To: grass-user at lists.osgeo.org
>>>> >> Subject: [GRASS-user] GRASS 7.0 Running Scripts (.\GRASS GIS
>>>> >>         7.0.0\scripts)
>>>> >> Message-ID:
>>>> >>         <
>>>> >> CAFvPsPBH1xVpEgff15hxknY0qeeMUeehP9bucV4FB9ZgQ_2+cg at mail.gmail.com>
>>>> >> Content-Type: text/plain; charset="utf-8"
>>>> >>
>>>> >> Hello,
>>>> >>
>>>> >> How do I run scripts located in C:\Program Files (x86)\GRASS GIS
>>>> >> 7.0.0\scripts?
>>>> >>
>>>> >> I am learning GRASS 7.0.0 on Windows 7 by converting some GRASS 6.4
>>>> shell
>>>> >> scripts to GRASS 7 Python scripts (import grass.script as grass) and
>>>> GRASS
>>>> >> 7 PyGRASS scripts (from grass.pygrass.modules import Module).
>>>> >>
>>>> >> My installation is working fine. I can manually run the commands
>>>> (from a
>>>> >> shell script) in the "Command console" window of the "Layer
>>>> Manager". For
>>>> >> example, I can enter "g.region swwake_30m -p" in the "Command
>>>> prompt" area
>>>> >> and get the following results:
>>>> >>
>>>> >>
>>>> >> Sun Mar 01 12:32:30
>>>> >> 2015)
>>>> >> g.region swwake_30m
>>>> >> -p
>>>> >> projection: 99 (Lambert Conformal Conic)
>>>> >> zone:       0
>>>> >> datum:      nad83
>>>> >> ellipsoid:  a=6378137 es=0.006694380022900787
>>>> >> north:      228500
>>>> >> south:      215000
>>>> >> west:       630000
>>>> >> east:       645000
>>>> >> nsres:      30
>>>> >> ewres:      30
>>>> >> rows:       450
>>>> >> cols:       500
>>>> >> cells:      225000
>>>> >> (Sun Mar 01 12:32:31 2015) Command finished (0
>>>> >> sec)
>>>> >>
>>>> >> I am using the "Pythonwin" IDE to develop the scripts (C:\Program
>>>> Files
>>>> >> (x86)\GRASS GIS
>>>> 7.0.0\Python27\lib\site-packages\pythonwin\Pythonwin.exe).
>>>> >> In the "GRASS GIS 7.0.0 GUI" Command Prompt window I type
>>>> "pythonwin" and
>>>> >> the IDE starts up.
>>>> >>
>>>> >> I have spent several days trying to understand how to create GRASS
>>>> Python
>>>> >> scripts and GRASS PyGRASS scripts from the online documentation(
>>>> >> http://grasswiki.osgeo.org/wiki/GRASS_and_Python) and by studying
>>>> the
>>>> >> script samples (C:\Program Files (x86)\GRASS GIS 7.0.0\scripts). I
>>>> have
>>>> >> not
>>>> >> been successful in getting example code to run but I am still working
>>>> >> through the documentation.
>>>> >>
>>>> >> But, I should be able to run scripts located in C:\Program Files
>>>> >> (x86)\GRASS GIS 7.0.0\scripts.
>>>> >>
>>>> >> Correct?
>>>> >>
>>>> >> 1. If I open .\scripts\d.what.rast.py in the Pythonwin IDE and try
>>>> to run
>>>> >> it, I get this output:
>>>> >>
>>>> >> OSError error(9): The handle is invalid
>>>> >> Traceback (most recent call last):
>>>> >>   File "C:\Program Files (x86)\GRASS GIS
>>>> >>
>>>> >>
>>>> 7.0.0\Python27\lib\site-packages\pythonwin\pywin\framework\scriptutils.py",
>>>> >> line 325, in RunScript
>>>> >>     exec codeObject in __main__.__dict__
>>>> >>   File
>>>> >>
>>>> >>
>>>> "C:\Users\Rob\Documents\grassscripts\pygrass\make_raster_using_mapcalc.py",
>>>> >> line 8, in <module>
>>>> >>     g.message("Filter elevation map by a threshold...")
>>>> >>   File "C:\Program Files (x86)\GRASS GIS
>>>> >> 7.0.0\etc\python\grass\pygrass\modules\shortcuts.py", line 46, in
>>>> >> __getattr__
>>>> >>     return self.cls('%s.%s' % (self.prefix, name.replace('_', '.')))
>>>> >>   File "C:\Program Files (x86)\GRASS GIS
>>>> >> 7.0.0\etc\python\grass\pygrass\modules\interface\module.py", line
>>>> 498, in
>>>> >> __init__
>>>> >>     raise GrassError(str_err % self.name)
>>>> >> GrassError: Error running: `g.message --interface-description`.
>>>> >> Traceback (most recent call last):
>>>> >>   File "C:\Program Files (x86)\GRASS GIS
>>>> >>
>>>> >>
>>>> 7.0.0\Python27\lib\site-packages\pythonwin\pywin\framework\scriptutils.py",
>>>> >> line 325, in RunScript
>>>> >>     exec codeObject in __main__.__dict__
>>>> >>   File "C:\Program Files (x86)\GRASS GIS 7.0.0\scripts\
>>>> d.what.rast.py",
>>>> >> line 45, in <module>
>>>> >>     main()
>>>> >>   File "C:\Program Files (x86)\GRASS GIS 7.0.0\scripts\
>>>> d.what.rast.py",
>>>> >> line 30, in main
>>>> >>     options, flags = gcore.parser()
>>>> >>   File "C:\Program Files (x86)\GRASS GIS
>>>> >> 7.0.0\etc\python\grass\script\core.py", line 680, in parser
>>>> >>     p = subprocess.Popen([prog, '-n'] + argv, stdout=subprocess.PIPE)
>>>> >>   File "C:\Program Files (x86)\GRASS GIS
>>>> >> 7.0.0\Python27\lib\subprocess.py",
>>>> >> line 703, in __init__
>>>> >>     errread, errwrite) = self._get_handles(stdin, stdout, stderr)
>>>> >>   File "C:\Program Files (x86)\GRASS GIS
>>>> >> 7.0.0\Python27\lib\subprocess.py",
>>>> >> line 839, in _get_handles
>>>> >>     p2cread = self._make_inheritable(p2cread)
>>>> >>   File "C:\Program Files (x86)\GRASS GIS
>>>> >> 7.0.0\Python27\lib\subprocess.py",
>>>> >> line 878, in _make_inheritable
>>>> >>     _subprocess.DUPLICATE_SAME_ACCESS)
>>>> >> WindowsError: [Error 6] The handle is invalid
>>>> >> Traceback (most recent call last):
>>>> >>   File "C:\Program Files (x86)\GRASS GIS
>>>> >>
>>>> >>
>>>> 7.0.0\Python27\lib\site-packages\pythonwin\pywin\framework\scriptutils.py",
>>>> >> line 325, in RunScript
>>>> >>     exec codeObject in __main__.__dict__
>>>> >>   File "C:\Program Files (x86)\GRASS GIS 7.0.0\scripts\
>>>> d.what.rast.py",
>>>> >> line 45, in <module>
>>>> >>     main()
>>>> >>   File "C:\Program Files (x86)\GRASS GIS 7.0.0\scripts\
>>>> d.what.rast.py",
>>>> >> line 30, in main
>>>> >>     options, flags = gcore.parser()
>>>> >>   File "C:\Program Files (x86)\GRASS GIS
>>>> >> 7.0.0\etc\python\grass\script\core.py", line 680, in parser
>>>> >>     p = subprocess.Popen([prog, '-n'] + argv, stdout=subprocess.PIPE)
>>>> >>   File "C:\Program Files (x86)\GRASS GIS
>>>> >> 7.0.0\Python27\lib\subprocess.py",
>>>> >> line 703, in __init__
>>>> >>     errread, errwrite) = self._get_handles(stdin, stdout, stderr)
>>>> >>   File "C:\Program Files (x86)\GRASS GIS
>>>> >> 7.0.0\Python27\lib\subprocess.py",
>>>> >> line 839, in _get_handles
>>>> >>     p2cread = self._make_inheritable(p2cread)
>>>> >>   File "C:\Program Files (x86)\GRASS GIS
>>>> >> 7.0.0\Python27\lib\subprocess.py",
>>>> >> line 878, in _make_inheritable
>>>> >>     _subprocess.DUPLICATE_SAME_ACCESS)
>>>> >> WindowsError: [Error 6] The handle is invalid
>>>> >> >>>
>>>> >>
>>>> >> 2. If I go to the "Python shell" tab on the "Layer Manager" and do
>>>> File ->
>>>> >> Launch Script and browse to .\scripts\d.what.rast.py, I get this
>>>> output:
>>>> >>
>>>> >> (Sun Mar 01 12:32:31 2015) Command finished (0
>>>> >> sec)
>>>> >> Launching script 'C:\Program Files (x86)\GRASS GIS 7.0.0\scripts\
>>>> >> d.what.rast.py'...
>>>> >> Traceback (most recent call last):
>>>> >>   File "C:\Program Files (x86)\GRASS GIS
>>>> >> 7.0.0\gui\wxpython\gui_core\forms.py", line 718, in OnRun
>>>> >>
>>>> >> gcmd.Command(cmd)
>>>> >>   File "C:\Program Files (x86)\GRASS GIS
>>>> >> 7.0.0\gui\wxpython\core\gcmd.py", line 397, in __init__
>>>> >>
>>>> >> _("Error: ") + self.__GetError()))
>>>> >> core.gcmd
>>>> >> .
>>>> >> GException
>>>> >> :
>>>> >> Execution failed: 'd.what.rast map=elevation'
>>>> >> Details:
>>>> >> Error:
>>>> >>
>>>> >> Any ideas on what might be going on here?
>>>> >>
>>>> >> Rob Parsons
>>>> >> Raleigh NC
>>>> >> -------------- next part --------------
>>>> >> An HTML attachment was scrubbed...
>>>> >> URL: <
>>>> >>
>>>> http://lists.osgeo.org/pipermail/grass-user/attachments/20150301/b41b2959/attachment-0001.html
>>>> >> >
>>>> >>
>>>> >> ------------------------------
>>>> >>
>>>> >> Message: 2
>>>> >> Date: Sun, 1 Mar 2015 20:12:57 -0500
>>>> >> From: Vaclav Petras <wenzeslaus at gmail.com>
>>>> >> To: Rob Parsons <jrobparsons at gmail.com>
>>>> >> Cc: GRASS user list <grass-user at lists.osgeo.org>
>>>> >> Subject: Re: [GRASS-user] GRASS 7.0 Running Scripts (.\GRASS GIS
>>>> >>         7.0.0\scripts)
>>>> >> Message-ID:
>>>> >>         <CABo5uVt7hq0QnHYqzV5O949h3URGxFOAjHNLxiMx=
>>>> >> V5rSK_wRw at mail.gmail.com>
>>>> >> Content-Type: text/plain; charset="utf-8"
>>>> >>
>>>> >> On Sun, Mar 1, 2015 at 7:37 PM, Rob Parsons <jrobparsons at gmail.com>
>>>> >> wrote:
>>>> >>
>>>> >> > Hello,
>>>> >> >
>>>> >> > How do I run scripts located in C:\Program Files (x86)\GRASS GIS
>>>> >> > 7.0.0\scripts?
>>>> >> >
>>>> >> > I am learning GRASS 7.0.0 on Windows 7 by converting some GRASS 6.4
>>>> >> shell
>>>> >> > scripts to GRASS 7 Python scripts (import grass.script as grass)
>>>> and
>>>> >> GRASS
>>>> >> > 7 PyGRASS scripts (from grass.pygrass.modules import Module).
>>>> >> >
>>>> >> > My installation is working fine. I can manually run the commands
>>>> (from a
>>>> >> > shell script) in the "Command console" window of the "Layer
>>>> Manager".
>>>> >> For
>>>> >> > example, I can enter "g.region swwake_30m -p" in the "Command
>>>> prompt"
>>>> >> area
>>>> >> > and get the following results:
>>>> >> >
>>>> >> >
>>>> >> > Sun Mar 01 12:32:30
>>>> >> > 2015)
>>>> >> > g.region swwake_30m
>>>> >> > -p
>>>> >> > projection: 99 (Lambert Conformal Conic)
>>>> >> > zone:       0
>>>> >> > datum:      nad83
>>>> >> > ellipsoid:  a=6378137 es=0.006694380022900787
>>>> >> > north:      228500
>>>> >> > south:      215000
>>>> >> > west:       630000
>>>> >> > east:       645000
>>>> >> > nsres:      30
>>>> >> > ewres:      30
>>>> >> > rows:       450
>>>> >> > cols:       500
>>>> >> > cells:      225000
>>>> >> > (Sun Mar 01 12:32:31 2015) Command finished (0
>>>> >> > sec)
>>>> >> >
>>>> >> > I am using the "Pythonwin" IDE to develop the scripts (C:\Program
>>>> Files
>>>> >> > (x86)\GRASS GIS
>>>> >> 7.0.0\Python27\lib\site-packages\pythonwin\Pythonwin.exe).
>>>> >> > In the "GRASS GIS 7.0.0 GUI" Command Prompt window I type
>>>> "pythonwin"
>>>> >> and
>>>> >> > the IDE starts up.
>>>> >> >
>>>> >> > I have spent several days trying to understand how to create GRASS
>>>> >> Python
>>>> >> > scripts and GRASS PyGRASS scripts from the online documentation(
>>>> >> > http://grasswiki.osgeo.org/wiki/GRASS_and_Python) and by studying
>>>> the
>>>> >> > script samples (C:\Program Files (x86)\GRASS GIS 7.0.0\scripts). I
>>>> have
>>>> >> not
>>>> >> > been successful in getting example code to run but I am still
>>>> working
>>>> >> > through the documentation.
>>>> >> >
>>>> >> > Please try the example from:
>>>> >>
>>>> >> http://grass.osgeo.org/grass70/manuals/libpython/script_intro.html
>>>> >>
>>>> >> I linked this page from documentation as well as the other Python
>>>> wiki
>>>> >> page
>>>> >> from the GRASS and Python page:
>>>> >>
>>>> >> http://grasswiki.osgeo.org/wiki/GRASS_Python_Scripting_Library
>>>> >>
>>>> >> Note that GRASS scripts by default cannot run from outside GRASS GIS
>>>> >> session (environment). This is probably not emphasized enough in the
>>>> >> documentation.
>>>> >>
>>>> >> But, I should be able to run scripts located in C:\Program Files
>>>> >> > (x86)\GRASS GIS 7.0.0\scripts.
>>>> >> >
>>>> >> > Correct?
>>>> >> >
>>>> >> > Correct but can you please try some other module than a d.*
>>>> module, e.g.
>>>> >> r.out.xyz? d.* commands are somehow special (although in this case it
>>>> >> probably doesn't matter).
>>>> >>
>>>> >>
>>>> >> > 1. If I open .\scripts\d.what.rast.py in the Pythonwin IDE and
>>>> try to
>>>> >> run
>>>> >> > it, I get this output:
>>>> >> >
>>>> >> > OSError error(9): The handle is invalid
>>>> >> > Traceback (most recent call last):
>>>> >> >   File "C:\Program Files (x86)\GRASS GIS
>>>> >> >
>>>> >>
>>>> 7.0.0\Python27\lib\site-packages\pythonwin\pywin\framework\scriptutils.py",
>>>> >> > line 325, in RunScript
>>>> >> >     exec codeObject in __main__.__dict__
>>>> >> >   File
>>>> >> >
>>>> >>
>>>> "C:\Users\Rob\Documents\grassscripts\pygrass\make_raster_using_mapcalc.py",
>>>> >> > line 8, in <module>
>>>> >> >     g.message("Filter elevation map by a threshold...")
>>>> >> >   File "C:\Program Files (x86)\GRASS GIS
>>>> >> > 7.0.0\etc\python\grass\pygrass\modules\shortcuts.py", line 46, in
>>>> >> > __getattr__
>>>> >> >     return self.cls('%s.%s' % (self.prefix, name.replace('_',
>>>> '.')))
>>>> >> >   File "C:\Program Files (x86)\GRASS GIS
>>>> >> > 7.0.0\etc\python\grass\pygrass\modules\interface\module.py", line
>>>> 498,
>>>> >> in
>>>> >> > __init__
>>>> >> >     raise GrassError(str_err % self.name)
>>>> >> > GrassError: Error running: `g.message --interface-description`.
>>>> >> > Traceback (most recent call last):
>>>> >> >   File "C:\Program Files (x86)\GRASS GIS
>>>> >> >
>>>> >>
>>>> 7.0.0\Python27\lib\site-packages\pythonwin\pywin\framework\scriptutils.py",
>>>> >> > line 325, in RunScript
>>>> >> >     exec codeObject in __main__.__dict__
>>>> >> >   File "C:\Program Files (x86)\GRASS GIS 7.0.0\scripts\
>>>> d.what.rast.py",
>>>> >> > line 45, in <module>
>>>> >> >     main()
>>>> >> >   File "C:\Program Files (x86)\GRASS GIS 7.0.0\scripts\
>>>> d.what.rast.py",
>>>> >> > line 30, in main
>>>> >> >     options, flags = gcore.parser()
>>>> >> >   File "C:\Program Files (x86)\GRASS GIS
>>>> >> > 7.0.0\etc\python\grass\script\core.py", line 680, in parser
>>>> >> >     p = subprocess.Popen([prog, '-n'] + argv,
>>>> stdout=subprocess.PIPE)
>>>> >> >   File "C:\Program Files (x86)\GRASS GIS
>>>> >> > 7.0.0\Python27\lib\subprocess.py", line 703, in __init__
>>>> >> >     errread, errwrite) = self._get_handles(stdin, stdout, stderr)
>>>> >> >   File "C:\Program Files (x86)\GRASS GIS
>>>> >> > 7.0.0\Python27\lib\subprocess.py", line 839, in _get_handles
>>>> >> >     p2cread = self._make_inheritable(p2cread)
>>>> >> >   File "C:\Program Files (x86)\GRASS GIS
>>>> >> > 7.0.0\Python27\lib\subprocess.py", line 878, in _make_inheritable
>>>> >> >     _subprocess.DUPLICATE_SAME_ACCESS)
>>>> >> > WindowsError: [Error 6] The handle is invalid
>>>> >> > Traceback (most recent call last):
>>>> >> >   File "C:\Program Files (x86)\GRASS GIS
>>>> >> >
>>>> >>
>>>> 7.0.0\Python27\lib\site-packages\pythonwin\pywin\framework\scriptutils.py",
>>>> >> > line 325, in RunScript
>>>> >> >     exec codeObject in __main__.__dict__
>>>> >> >   File "C:\Program Files (x86)\GRASS GIS 7.0.0\scripts\
>>>> d.what.rast.py",
>>>> >> > line 45, in <module>
>>>> >> >     main()
>>>> >> >   File "C:\Program Files (x86)\GRASS GIS 7.0.0\scripts\
>>>> d.what.rast.py",
>>>> >> > line 30, in main
>>>> >> >     options, flags = gcore.parser()
>>>> >> >   File "C:\Program Files (x86)\GRASS GIS
>>>> >> > 7.0.0\etc\python\grass\script\core.py", line 680, in parser
>>>> >> >     p = subprocess.Popen([prog, '-n'] + argv,
>>>> stdout=subprocess.PIPE)
>>>> >> >   File "C:\Program Files (x86)\GRASS GIS
>>>> >> > 7.0.0\Python27\lib\subprocess.py", line 703, in __init__
>>>> >> >     errread, errwrite) = self._get_handles(stdin, stdout, stderr)
>>>> >> >   File "C:\Program Files (x86)\GRASS GIS
>>>> >> > 7.0.0\Python27\lib\subprocess.py", line 839, in _get_handles
>>>> >> >     p2cread = self._make_inheritable(p2cread)
>>>> >> >   File "C:\Program Files (x86)\GRASS GIS
>>>> >> > 7.0.0\Python27\lib\subprocess.py", line 878, in _make_inheritable
>>>> >> >     _subprocess.DUPLICATE_SAME_ACCESS)
>>>> >> > WindowsError: [Error 6] The handle is invalid
>>>> >> > >>>
>>>> >> >
>>>> >> >
>>>> >>
>>>> >> This might be somehow related to bug in Python itself:
>>>> >>
>>>> >> http://bugs.python.org/issue3905
>>>> >>
>>>> >> However, please focus on running the scripts for GRASS GIS from GRASS
>>>> >> session. The easiest way how to do that on MS Windows is to write the
>>>> >> script and then to start it from GUI (File > Run script) or from
>>>> Python
>>>> >> shell tab in the GUI.
>>>> >>
>>>> >> It is possible to run scripts which are using GRASS modules from
>>>> outside
>>>> >> of
>>>> >> GRASS session but it requires you to set up the GRASS environment
>>>> >> yourself.
>>>> >> This is possible but it has some challenges. On the other hand, if
>>>> you
>>>> >> write your script in the way that it runs (only) in a GRASS session
>>>> you
>>>> >> can
>>>> >> use GRASS features for automatic building of interface and thus
>>>> create a
>>>> >> true GRASS module.
>>>> >>
>>>> >>
>>>> >> > 2. If I go to the "Python shell" tab on the "Layer Manager" and do
>>>> File
>>>> >> ->
>>>> >> > Launch Script and browse to .\scripts\d.what.rast.py, I get this
>>>> >> output:
>>>> >> >
>>>> >> > (Sun Mar 01 12:32:31 2015) Command finished (0
>>>> >> > sec)
>>>> >> > Launching script 'C:\Program Files (x86)\GRASS GIS 7.0.0\scripts\
>>>> >> > d.what.rast.py'...
>>>> >> > Traceback (most recent call last):
>>>> >> >   File "C:\Program Files (x86)\GRASS GIS
>>>> >> > 7.0.0\gui\wxpython\gui_core\forms.py", line 718, in OnRun
>>>> >> >
>>>> >> > gcmd.Command(cmd)
>>>> >> >   File "C:\Program Files (x86)\GRASS GIS
>>>> >> > 7.0.0\gui\wxpython\core\gcmd.py", line 397, in __init__
>>>> >> >
>>>> >> > _("Error: ") + self.__GetError()))
>>>> >> > core.gcmd
>>>> >> > .
>>>> >> > GException
>>>> >> > :
>>>> >> > Execution failed: 'd.what.rast map=elevation'
>>>> >> > Details:
>>>> >> > Error:
>>>> >> >
>>>> >> > The error message seems to be incomplete but in any case, please
>>>> try
>>>> >> with
>>>> >> r.out.xyz script and the example script from:
>>>> >>
>>>> >> http://grass.osgeo.org/grass70/manuals/libpython/script_intro.html
>>>> >>
>>>> >> Vaclav
>>>> >>
>>>> >>
>>>> >> > Any ideas on what might be going on here?
>>>> >> >
>>>> >> > Rob Parsons
>>>> >> > Raleigh NC
>>>> >> >
>>>> >> >
>>>> >> > _______________________________________________
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>>>> >> > grass-user at lists.osgeo.org
>>>> >> > http://lists.osgeo.org/mailman/listinfo/grass-user
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>>>> >>
>>>> >> ------------------------------
>>>> >>
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>>>> >> End of grass-user Digest, Vol 107, Issue 2
>>>> >> ******************************************
>>>> >>
>>>> >
>>>> >
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>>>
>>>
>>
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