Can you make a python subprocess output stdout and stderr as usual, but also capture the output as a string? [duplicate]

Answer 1

Create two readers as above, one for stdout one for stderr and start each in a new thread. This would append to the list in roughly the same order they were output by the process. Maintain two separate lists if you want.

i.e.,

p = subprocess.Popen(["the", "command"])
t1 = thread.start_new_thread(func,stdout)  # create a function with the readers
t2 = thread.start_new_thread(func,stderr)
p.wait() 
# your logic here