如何让python3x读取来自karma的终端输出？

import subprocess

def read_karma_output():
    # 启动Karma进程
    karma_process = subprocess.Popen(['karma', 'start'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)

    # 读取终端输出
    while True:
        output = karma_process.stdout.readline()
        if output == b'' and karma_process.poll() is not None:
            break
        if output:
            # 处理输出
            print(output.decode().strip())

    # 检查Karma进程的返回码
    if karma_process.returncode != 0:
        error_output = karma_process.stderr.read().decode().strip()
        print(f"Karma进程返回错误：{error_output}")

read_karma_output()