subprocess.Popen and thread module

[Danny Wong (dannwong)]

Hi All,
I'm trying to execute some external commands from multiple database.
I'm using threads and subprocess.Popen ( from docs, all the popen*
functions are deprecated and I was told to use subprocess.Popen) to
execute the external commands in parallel, but the commands seems to
hang.
My question is:
Is subprocess.Popen thread safe? If not, what other module should I use
to perform a system call? I also, want to log stdout and stderr to a
file. Thanks.

 

[Thomas Rachel]

Am 10.08.2011 08:38 schrieb Danny Wong (dannwong):

Hi All,
I'm trying to execute some external commands from multiple database.
I'm using threads and subprocess.Popen ( from docs, all the popen*
functions are deprecated and I was told to use subprocess.Popen) to
execute the external commands in parallel, but the commands seems to
hang.
My question is:
Is subprocess.Popen thread safe?

Do you really need threads here? As you just run those external commands
(as far as I understand), it might be enough to start the commands, hold
their object, read them out (maybe part for part) and then wait().


Thomas