import subprocess
import fcntl
import os,sys
import time

import logging
BASE_LOGGING_CONF = '[%(levelname)s] [%(asctime)s] %(message)s'
logging.basicConfig(level=logging.INFO,format=BASE_LOGGING_CONF)

def nonBlockRead(output):
    fd = output.fileno()
    fl = fcntl.fcntl(fd, fcntl.F_GETFL)
    fcntl.fcntl(fd, fcntl.F_SETFL, fl | os.O_NONBLOCK)
    try:
        return output.readline()
    except:
        return ''

class HiddenPrints:
    def __enter__(self):
        self._original_stdout = sys.stdout
        self._original_stderr = sys.stderr
        sys.stdout = open(os.devnull, 'w')
        sys.stderr = open(os.devnull, 'w')

    def __exit__(self, exc_type, exc_val, exc_tb):
        sys.stdout.close()
        sys.stderr.close()
        sys.stdout = self._original_stdout
        sys.stderr = self._original_stderr