화면 표시 없이 Python에서 시스템 명령 출력을 캡처하고 변수에 할당하는 방법은 무엇입니까?

import os

# Use os.popen to capture the output of the command
popen_object = os.popen('cat /etc/services')

# Read the output from the pipe object
output = popen_object.read()

# Print the output, which will not be displayed on the screen
print(output)

import subprocess

# Create a subprocess object
proc = subprocess.Popen(['cat', '/etc/services'], stdout=subprocess.PIPE)

# Communicate with the subprocess and retrieve its output
output, _ = proc.communicate()

# Print the output, which will not be displayed on the screen
print(output)