python read from file desriptor 3

Question

I need to read stream from FD 3(STDERR) in Python.

In perl I would do this:

# Open the audio file descriptor
$audio_fh->fdopen( 3, "r" );

$bytes_read = $audio_fh->read($buffer, 80000)

How do I do the same in Python?

Answer 1

Use os.fdopen to get a file object for a file descriptor.

import os
audio_fh = os.fdopen(3)

buffer = audio_fh.read(80000)

You can also read directly from the file descriptor with

buffer = os.read(3, 80000)