jython-users

[Jython-users] Capturing a Return Code?

[pr144 <pr...@ya...>]

I am running a Powershell script that executes a Task Manger scheduled 
job on a different Windows Server from the Jython script.

I am having a problem capturing the return value, the Powershell scripts 
takes about 1-2 minutes, this is the code,

pipe = subprocess.Popen(['powershell.exe', 
'MY_SCRIPT.ps1',stdout=sys.stdout]

This doesn't work, (it returns before Pwershell script completes),

pipe.communicate()

This just leaves the the Jython script running at the command prompt 
until I kill it,

retCode=pipe.wait()

What are the best options?


Thank you,
PR

Re: [Jython-users] Capturing a Return Code?

[Suvarchal <suv...@gm...>]

How about

cmd=["echo","hello"]
try:
    retval=subprocess.check_output(cmd)
except OSError as e:
    retval=e


Cheers,
Suvi

On Sun, Aug 12, 2018 at 10:58 AM pr144 via Jython-users <
jyt...@li...> wrote:

> I am running a Powershell script that executes a Task Manger scheduled job
> on a different Windows Server from the Jython script.
>
> I am having a problem capturing the return value, the Powershell scripts
> takes about 1-2 minutes, this is the code,
>
> pipe = subprocess.Popen(['powershell.exe',
> 'MY_SCRIPT.ps1',stdout=sys.stdout]
>
> This doesn't work, (it returns before Pwershell script completes),
>
> pipe.communicate()
>
> This just leaves the the Jython script running at the command prompt until
> I kill it,
>
> retCode=pipe.wait()
>
> What are the best options?
>
> Thank you,
> PR
>
>
> ------------------------------------------------------------------------------
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> _______________________________________________
> Jython-users mailing list
> Jyt...@li...
> https://lists.sourceforge.net/lists/listinfo/jython-users
>

Re: [Jython-users] Capturing a Return Code?

[Peter O'R. <pr...@ya...>]

Error says,  AttributeError: 'module' objects\ has no attribute 'check_output'
I need the  \return code from this line,   pipe = subprocess.Popen(['powershell.exe', 'MY_SCRIPT.ps1',stdout=sys.stdout]



Peter 

    On Sunday, August 12, 2018, 11:28:17 AM EDT, Suvarchal <suv...@gm...> wrote:  
 
 How about 

cmd=["echo","hello"]
try:
    retval=subprocess.check_output(cmd)
except OSError as e:
    retval=e


Cheers,
Suvi

On Sun, Aug 12, 2018 at 10:58 AM pr144 via Jython-users <jyt...@li...> wrote:

  
I am running a Powershell script that executes a Task Manger scheduled job on a different Windows Server from the Jython script.
 
I am having a problem capturing the return value, the Powershell scripts takes about 1-2 minutes, this is the code,
 
 
pipe = subprocess.Popen(['powershell.exe', 'MY_SCRIPT.ps1',stdout=sys.stdout]
 
This doesn't work, (it returns before Pwershell script completes),
 
 
pipe.communicate() 
 
 
This just leaves the the Jython script running at the command prompt until I kill it,
 
retCode=pipe.wait()
 
What are the best options?
 
 Thank you,
PR ------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot_______________________________________________
Jython-users mailing list
Jyt...@li...
https://lists.sourceforge.net/lists/listinfo/jython-users

  

Re: [Jython-users] Capturing a Return Code?

[<jem...@fr...>]

If the Python module is not working for you, perhaps try
java.lang.ProcessBuilder instead.  Something like:

import java
pb=java.lang.ProcessBuilder('powershell.exe', 'MY_SCRIPT.ps1')
#  Redirect stdout as desired.
p=pb.start()
p.waitFor()
print p.exitValue()



On Mon, 13 Aug 2018 17:20:43 +0000 (UTC), Peter O'Reilly via Jython-users
<jyt...@li...> wrote:
> Error says, AttributeError: 'module' objects has no attribute
> 'check_output'
> I need the return code from this line, pipe =
> subprocess.Popen(['powershell.exe', 'MY_SCRIPT.ps1',stdout=sys.stdout]
> 
> Peter 
> 
>     On Sunday, August 12, 2018, 11:28:17 AM EDT, Suvarchal  wrote:  
> 
>  How about 
> 
> cmd=["echo","hello"]
> try:
>  retval=subprocess.check_output(cmd)
> except OSError as e:
>  retval=e
> 
> Cheers,
> Suvi
> 
> On Sun, Aug 12, 2018 at 10:58 AM pr144 via Jython-users  wrote:
> 
> I am running a Powershell script that executes a Task Manger scheduled
> job on a different Windows Server from the Jython script. 
> 
> I am having a problem capturing the return value, the Powershell scripts
> takes about 1-2 minutes, this is the code,
> 
> pipe = subprocess.Popen(['powershell.exe',
> 'MY_SCRIPT.ps1',stdout=sys.stdout] 
> 
> This doesn't work, (it returns before Pwershell script completes),
> 
> pipe.communicate() 
> 
> This just leaves the the Jython script running at the command prompt
> until I kill it, 
> 
> retCode=pipe.wait() 
> 
> What are the best options? 
> 
> Thank you,
> PR
>  
>
------------------------------------------------------------------------------
>  Check out the vibrant tech community on one of the world's most
>  engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> [2]_______________________________________________
>  Jython-users mailing list
>  Jyt...@li... [3]
>  https://lists.sourceforge.net/lists/listinfo/jython-users [4]
>    
> 
> Links:
> ------
> [1] mailto:jyt...@li...
> [2] http://sdm.link/slashdot
> [3] mailto:Jyt...@li...
> [4] https://lists.sourceforge.net/lists/listinfo/jython-users

Re: [Jython-users] Capturing a Return Code?

[Jeff A. <ja...@fa...>]

==> script.ps1 <==
echo "Hello World!"
Exit 1234

==> script.py <==
import subprocess
p = subprocess.Popen(['powershell.exe', '-File', '.\\script.ps1'])
p.wait()
print "exit status =", p.returncode

==============

The p.wait() is important: 
https://docs.python.org/2/library/subprocess.html?highlight=check_output#subprocess.Popen.wait

Now ...

PS here> java -jar "C:\Jython\2.7.1-sa\jython-standalone-2.7.1.jar" 
script.py
Hello World!
exit status = 1234


Jeff Allen

On 13/08/2018 18:20, Peter O'Reilly via Jython-users wrote:
> Error says,
>   AttributeError: 'module' objects\ has no attribute 'check_output'
>
> I need the  \return code from this line,
> pipe = subprocess.Popen(['powershell.exe', 
> 'MY_SCRIPT.ps1',stdout=sys.stdout]
>
>
>
>
> Peter
>
>

Re: [Jython-users] Capturing a Return Code?

[pr144 <pr...@ya...>]

The problem is I can see the powershell is executing a Windows task, but 
control never returns back to the calling Jython script..even after the 
task is complete.

So Jython is never getting to p.returncode..

Seems like it's stuck on the p.wait() line...



On 8/13/2018 6:25 PM, Jeff Allen wro
>
> ==> script.ps1 <==
> echo "Hello World!"
> Exit 1234
>
> ==> script.py <==
> import subprocess
> p = subprocess.Popen(['powershell.exe', '-File', '.\\script.ps1'])
> p.wait()
> print "exit status =", p.returncode
>
> ==============
>
> The p.wait() is important: 
> https://docs.python.org/2/library/subprocess.html?highlight=check_output#subprocess.Popen.wait
>
> Now ...
>
> PS here> java -jar "C:\Jython\2.7.1-sa\jython-standalone-2.7.1.jar" 
> script.py
> Hello World!
> exit status = 1234
>
>
> Jeff Allen
> On 13/08/2018 18:20, Peter O'Reilly via Jython-users wrote:
>> Error says,
>>   AttributeError: 'module' objects\ has no attribute 'check_output'
>>
>> I need the  \return code from this line,
>> pipe = subprocess.Popen(['powershell.exe', 
>> 'MY_SCRIPT.ps1',stdout=sys.stdout]
>>
>>
>>
>>
>> Peter
>>
>>
>
-- 
Thank you,
Peter O'Reilly

Re: [Jython-users] Capturing a Return Code?

[Jeff A. <ja...@fa...>]

Hi Peter:

 From here it is a question of zeroing-in on the boundary between what 
works and what doesn't -- the usual debugging process.

Does my simple example work for you, with the simple script?

If even that fails for you, ask what powershell may be doing at 
start-up. It loads libraries from various default places. Maybe that 
hangs. There is a -NoProfile option to suppress some of it. And a 
-NonInteractive (?) I think probably simplifies i/o. You can look up the 
options.

If the simple script works, then it seems to be something about your 
script. It is obviously more complicated than mine. If you start from my 
simple script and introduce your own by parts, where does it start to hang?

You want to capture the output, but the way you show stdout captured is 
not what we see in the documentation (use PIPE). There are also warnings 
that when doing so, deadlock is possible but communicate() is a good 
choice. It seems to include the wait(). Here is a version of my example 
that captures the output:

==> script.py <==

import subprocess
p = subprocess.Popen(['powershell.exe', '-File', '.\\script.ps1'],
                      stdout=subprocess.PIPE, stderr=subprocess.PIPE)
r = p.communicate()
print "stdout =", repr(r[0])
print "stderr =", repr(r[1])
print "exit status =", p.returncode

I am using repr() in the output to make visible non-printing or 
non-ascii characters (bytes really) that may be a source of problems.

PS here> java -jar "C:\Jython\2.7.1-sa\jython-standalone-2.7.1.jar" script.py
stdout = 'Hello World!\r\n'
stderr = ''
exit status = 1234

Lastly, all this may equally be run under C Python, in case you suspect 
a divergence or broken installation. (Jython has to work hard to conceal 
various differences between Java Process API and the system call. Or 
maybe your library is bad.) It worked for me under IDLE.

Jeff

Jeff Allen

On 14/08/2018 00:32, pr144 wrote:
>
> The problem is I can see the powershell is executing a Windows task, 
> but control never returns back to the calling Jython script..even 
> after the task is complete.
>
> So Jython is never getting to p.returncode..
>
> Seems like it's stuck on the p.wait() line...
>
>
>
> On 8/13/2018 6:25 PM, Jeff Allen wro
>>
>> ==> script.ps1 <==
>> echo "Hello World!"
>> Exit 1234
>>
>> ==> script.py <==
>> import subprocess
>> p = subprocess.Popen(['powershell.exe', '-File', '.\\script.ps1'])
>> p.wait()
>> print "exit status =", p.returncode
>>
>> ==============
>>
>> The p.wait() is important: 
>> https://docs.python.org/2/library/subprocess.html?highlight=check_output#subprocess.Popen.wait
>>
>> Now ...
>>
>> PS here> java -jar "C:\Jython\2.7.1-sa\jython-standalone-2.7.1.jar" 
>> script.py
>> Hello World!
>> exit status = 1234
>>
>>
>> Jeff Allen
>> On 13/08/2018 18:20, Peter O'Reilly via Jython-users wrote:
>>> Error says,
>>>   AttributeError: 'module' objects\ has no attribute 'check_output'
>>>
>>> I need the  \return code from this line,
>>> pipe = subprocess.Popen(['powershell.exe', 
>>> 'MY_SCRIPT.ps1',stdout=sys.stdout]
>>>
>>>
>>>
>>>
>>> Peter
>>>
>>>
>>
> -- 
> Thank you,
> Peter O'Reilly