tempfile / subprocess

import tempfile
# 임시 디렉토리에서 압축을 푼다든지로 응용될 수 있음

with tempfile.TemporaryFile(mode='w+') as t:
    t.write('hello')
    t.seek(0)
    print(t.read())  # hello

with tempfile.NamedTemporaryFile(delete=False) as t:
    print(t.name)
    with open(t.name, 'w+') as f:
        f.write('test\n')
        f.seek(0)
        print(f.read())

with tempfile.TemporaryDirectory() as td:
    print(td)

####################################################################
import subprocess

# 과거 방식: os.system('ls')
r = subprocess.run(['ls', '-al'])
print(r.returncode)

# 야래 pipe 는 동작 하지 않음
subprocess.run(['ls', '-al', '|', 'grep', 'test'])

# pipe 를 사용하고 싶다면 ..
p1 = subprocess.Popen(['ls', '-al'], stdout = subprocess.PIPE)
p2 = subprocess.Popen(['grep', 'test'], stdin=p1.stdout, stdout=subprocess.PIPE)
p1.stdout.close()
output = p2.communicate()[0]
print(output)