python subprocess with environment variables
import subprocess, os
my_env = os.environ.copy()
my_env["PATH"] = "/usr/sbin:/sbin:" + my_env["PATH"]
subprocess.Popen(my_command, env=my_env)python subprocess with environment variables
import subprocess, os
my_env = os.environ.copy()
my_env["PATH"] = "/usr/sbin:/sbin:" + my_env["PATH"]
subprocess.Popen(my_command, env=my_env)python subprocess exception handling
try:
subprocess.check_output(...)
except subprocess.CalledProcessError as e:
print(e.output)python run function in subprocess
# no, we can't use subprocess module for that
import multiprocessing
import time
def task(*args):
print("wait")
time.sleep(2)
print(*args)
print("finished")
if __name__ == "__main__":
# child process has different __name__
process = multiprocessing.Process(target=task, args=(69, 66))
# args must be pickable
# Pickable objects https://docs.python.org/3/library/pickle.html#what-can-be-pickled-and-unpickled
process.start()
process.join() # make sure this gets executed only after process startsCopyright © 2021 Codeinu
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