Develop Reference

Run jar file as Administrator

I am running a jar file from python.
This jar must be run as administrator in order to work.
the python script is run in a jenkins job.
Is there a way to run the jar/python script as and administrator?
either from the jenkins job - or modify the python script.
with subprocess.Popen(command,
cwd=tool_dir,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
shell=True) as proc:
try:
outs, errs = proc.communicate(timeout=1000)
Thank you!

Getting output of command execution on windowed app

I have created a Python script and compiled it into an exe file with PyInstaller. In the process, I have specified the -w option to get an app that doesn't have any console.
Everything works fine except the execution of commands using popen:
mout = subprocess.Popen(['ls','C:\'])
This line generates an exception [Error 6] The handle is invalid.
I have tried adding the parameters
stdout=subprocess.PIPE, stderr=subprocess.PIPE but it stills not working. I think that is because the main process doesn't have any console assigned. I want to execute the command but without opening any shell, it has to be transparent to the user.
Is there any option?

This should solve your issue.
proc = subprocess.Popen(['ls','C:\\'], shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE, creationflags=CREATE_NO_WINDOW)

Popen reading from stdout takes a very very long time

I am trying to capture the output from a shell command (npm --version) however only the first line is read and the process does not end.
import subprocess
proc = subprocess.Popen(['npm', '--version'], stdout=subprocess.PIPE, stderr=subprocess.STDOUT, shell=True)
proc.wait()
for line in proc.stdout:
print(line.decode("utf-8").strip())
print("does not get here?!")
Any idea how I could detect the end of this process?.
If I open a cmd and execute 'npm --version', it ends as expected so I do not know why this done in the above does not end.
Some extra information that maybe of use!...
npm is installed via nvm
this is used to manage node installs via symlinks
npm from what I can see is a .cmd file that executes node?
Running this in python command prompt...
>>> import subprocess
>>> proc = subprocess.Popen(['npm', '--version'], stdout=subprocess.PIPE, stderr=subprocess.STDOUT, shell=True)
>>> proc.wait()
0
>>> proc.stdout.readline()
'6.10.3\n'
>>> proc.stdout.readline()
''
Now the second .readline() takes a very very long time to complete!

Using stdout=PIPE and/or stderr=PIPE in popen.wait() will cause a deadlock. Try using communicate() to avoid that.
This is due to other OS pipe buffers filling up and blocking the child process.
See this documentation on how to use communicate ()
https://docs.python.org/2/library/subprocess.html
Hope I could help!

Can you please share the console output when you manually type on the command prompt please.
The code you have shared works on my machine and i am assuming it may have to do something with the way npm is installed. In any case can you share the output from command console.
Thanks
Pushpa

Python executing one command inside another DOS .exe command

In python I know how to launch a command using subprocess.Popen
process = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
what I have to do is: 1) call an executable .exe command, 2) then after that command is running within it call another command.
So when I do 1) like this:
process = subprocess.Popen("C:\Automation\helpFiles\topCmd.exe", shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
once that is running I need to run another command i.e state
how can I do it?

Get output and Return code from external shell command in python

Suppose I run a command cmd="start python Testscript.py" using subprocess in python.
subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
Is there any way to get the output of the new command console ?
Is there any way to get the return code from the TestScript.py into the calling python function.