[Python] Subprocess 명령 결과 실시간으로 출력하기

import subprocess
import sys
with open('test.log', 'w') as f:
    process = subprocess.Popen(your_command, stdout=subprocess.PIPE)
    # for python2, use ''
    for c in iter(lambda: process.stdout.read(1), ''): 
        sys.stdout.write(c)
        f.write(c)

    # for python3, use b''
    for c in iter(lambda: process.stdout.read(1), b''):
        sys.stdout.write(c)
        f.write(c)

or

import subprocess
import sys
with open('test.log', 'w') as f:
    process = subprocess.Popen(your_command, stdout=subprocess.PIPE)

    # for python2, use ''
    for line in iter(process.stdout.readline, ''):
        sys.stdout.write(c)
        f.write(c)

    # for python3, use b''
    for line in iter(process.stdout.readline, b''):
        sys.stdout.write(c)
        f.write(c)