Python에서 프로그램 출력을 효과적으로 캡처하는 방법: 기본 솔루션 이상

# writer.py
import sys

def write():
    sys.stdout.write("foobar")

# mymodule.py
from writer import write

out = write()
print(out.upper())

import sys
from cStringIO import StringIO

# Redirect stdout to a StringIO object
backup = sys.stdout
sys.stdout = StringIO()

# Perform the write operation
write()

# Retrieve and restore stdout
out = sys.stdout.getvalue()
sys.stdout.close()
sys.stdout = backup

# Process the captured output
print(out.upper())

from contextlib import redirect_stdout
import io

f = io.StringIO()
# Redirect stdout to f using the context manager
with redirect_stdout(f):
    help(pow)

# Retrieve captured output from f
s = f.getvalue()