如何在python中调用外部程序并检索输出并返回代码？

import subprocess

def run_command(command):
    process = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
    output, error = process.communicate()
    return_code = process.returncode
    return output.decode('utf-8'), error.decode('utf-8'), return_code

command = "echo 'Hello, World!'"
output, error, return_code = run_command(command)

print("Output: ", output)
print("Error: ", error)
print("Return Code: ", return_code)