Run Python script in different environments

Question

Meena Yegappan 0 Newbie Poster

10 Years Ago

Hi I am trying to run a python script which has this code snippet:

process = subprocess.Popen('./start_ws.pl')
process.wait()
os.system('make')

The perl script started changes environmental variables and
enters into new subshell.
After entering into new subshell, the commands below script

os.system('make')

goes unnoticed.They get executed only if i exit from subshell(created by pl script).
The system command 'make' is executable only in new subshell.

I tried like,

pid = os.fork()

if pid > 0:
  os.wait()
  os.system('make clean')

else:
  os.system('./start_ws.pl')

Even this doesnt work.

Kindly help me to run 'make' command in same env created by 'start_ws.pl' perl script.

python shell subprocess

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Latest Post 10 Years Ago Latest Post by slate

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slate 241 Posting Whiz in Training · Answer 1 · 2013-05-22T17:32:59+00:00

After the subprocess exits, the environment is "gone".

So theoretically you have the following options:

Combine the two commands into one process, so they share the same environment.
Wrap the first command with into a program that returns the environment and run the second command in this one. Use env on unix, and set on windows. (http://stackoverflow.com/questions/1214496/how-to-get-environment-from-a-subprocess-in-python)
replace the current process with os.exec*

I know, this does not solve your problem, but I have to go...