Capture file descriptors while running an external program

I have a problem with the module subprocess! The problem is that the external software that I am running under subprocess.Popen opens stdin, stdout, stderr, and other file descriptors to write and read in the hard drive. As many other programs... I know how to capture stdin, stdout and stderr,

Capture file descriptors while running an external program

Hi all! I have a problem with the module subprocess! The problem is that the external software that I am running under subprocess.Popen opens stdin, stdout, stderr, and other file descriptors to write and read in the hard drive. I know how to capture stdin, stdout and stderr, what I cannot do is