I'm studying image matching with Superpoint( https://github.com/rpautrat/SuperPoint ).
I tried to run the codes written in Usage area. Unfortunately, I'm using this code on Windows10 and Superpoint written for linux so I got a lot of error... :(
Especially, https://github.com/rpautrat/SuperPoint/blob/master/superpoint/utils/stdout_capturing.py cause critical error to me.
There is a part of subprocess.Popen for write the log file with file descriptor. I want to get log file result as same as result gotten from the linux os.
The code is below.... and I think that tee command is not working on Windows that's why this part cause the error.
I hope edit this part for the run whole code for studying Superpoint.
Please let me know the solution for this file descriptor on Windows10 problem.
Thanks a lot for your kindness help!
#!/usr/bin/env python
# coding=utf-8
from __future__ import division, print_function, unicode_literals
import os
import sys
import subprocess
from threading import Timer
from contextlib import contextmanager
'''
Based on sacred/stdout_capturing.py in project Sacred
https://github.com/IDSIA/sacred
'''
def flush():
"""Try to flush all stdio buffers, both from python and from C."""
try:
sys.stdout.flush()
sys.stderr.flush()
except (AttributeError, ValueError, IOError):
pass # unsupported
# Duplicate stdout and stderr to a file. Inspired by:
# http://eli.thegreenplace.net/2015/redirecting-all-kinds-of-stdout-in-python/
# http://stackoverflow.com/a/651718/1388435
# http://stackoverflow.com/a/22434262/1388435
@contextmanager
def capture_outputs(filename):
"""Duplicate stdout and stderr to a file on the file descriptor level."""
# with NamedTemporaryFile(mode='w+') as target:
with open(filename, 'a+') as target:
original_stdout_fd = 1
original_stderr_fd = 2
target_fd = target.fileno()
# Save a copy of the original stdout and stderr file descriptors
saved_stdout_fd = os.dup(original_stdout_fd)
saved_stderr_fd = os.dup(original_stderr_fd)
tee_stdout = subprocess.Popen(
['tee', '-a', '/dev/stderr'], start_new_session=True,
stdin=subprocess.PIPE, stderr=target_fd, stdout=1)
tee_stderr = subprocess.Popen(
['tee', '-a', '/dev/stderr'], start_new_session=True,
stdin=subprocess.PIPE, stderr=target_fd, stdout=2)
flush()
os.dup2(tee_stdout.stdin.fileno(), original_stdout_fd)
os.dup2(tee_stderr.stdin.fileno(), original_stderr_fd)
try:
yield
finally:
flush()
# then redirect stdout back to the saved fd
tee_stdout.stdin.close()
tee_stderr.stdin.close()
# restore original fds
os.dup2(saved_stdout_fd, original_stdout_fd)
os.dup2(saved_stderr_fd, original_stderr_fd)
# wait for completion of the tee processes with timeout
# implemented using a timer because timeout support is py3 only
def kill_tees():
tee_stdout.kill()
tee_stderr.kill()
tee_timer = Timer(1, kill_tees)
try:
tee_timer.start()
tee_stdout.wait()
tee_stderr.wait()
finally:
tee_timer.cancel()
os.close(saved_stdout_fd)
os.close(saved_stderr_fd)
I'd go with this implementation: https://stackoverflow.com/a/17942748/5430833
First of all, 'tee' is a linux utility, unless you've got some port installed. /dev/stderr is also a unix descriptor for error output stream. As per this answer: cmd.exe equivalent of /dev/stdout, to write to stdout 'as a file' , there's no such descriptor equivalent for windows.
If you want your solution to be portable, I suggest sticking to python and avoiding Popen unless you are sure that process you are starting works on both platforms.
Edit : okay, forgive me as I haven't read the question carefully. So, you want some kind of a 'deamon' process which will capture all stdout and stderr. If you can live without output in the console, I'd go with a simple solution: comment the 'capture_outputs' content out and at your application boot (your test file or some kind of a main , before any SuperPoint code executes) redirect the streams:
sys.stdout = open('out.dat', 'w')
And somewhere at exit:
sys.stdout.close()
You could wrap your logic with a ContextManager so that in case of some internal exception files are closed properly.
I believe you could do the redirect within the 'capture_outputs' as well, but I advise to keep it simple unless we're sure it works.
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