python import subprocess # 启动子进程 process = subprocess.Popen(['ls', '-l'], stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True) # 等待子进程结束 process.wait() # 获取返回码 returncode = process.returncode print(f"返回码: {returncode}") 在这个例子中,subprocess.Popen()启动了...
'-l'],returncode=0)>>>subprocess.run("exit 1",shell=True,check=True)Traceback(most recent call last):...subprocess.CalledProcessError:Command'exit 1'returned non-zero exit status1>>>subprocess.run(["ls","-l","/dev/null"],stdout=subprocess.PIPE)CompletedProcess(args=['ls','-l',...
success:CompletedProcess(args=['dir','/b'],returncode=0,stdout='test.py\n',stderr='')error:CompletedProcess(args='exit 1',returncode=1,stdout='',stderr='') Popen() 方法 Popen 是 subprocess的核心,子进程的创建和管理都靠它处理。 构造函数: classsubprocess.Popen(args,bufsize=-1,executable=...
importsubprocesstry: result = subprocess.run(['ping','www.baidu.com'], capture_output=True, text=True, check=True)print(1, result.stdout)print(2, result.returncode)print(3, result.stderr)print(4, result.args)print(5, result.check_returncode())exceptsubprocess.CalledProcessErrorase:print(f...
importsubprocess# 导入 subprocess 模块result=subprocess.run(['echo','Hello, World!'],capture_output=True,text=True)output=result.stdout# 获取标准输出内容print("输出内容:",output)# 打印输出内容return_code=result.returncode# 获取返回码print("返回码:",return_code)# 打印返回码ifreturn_code==0:pr...
CompletedProcess+returncode: int+stdout: str+stderr: str 通过图中可以看到,subprocess类中的run()方法返回CompletedProcess的一个实例,允许我们访问返回值、标准输出和标准错误等信息。 希望这篇文章能够帮助你更深入地理解和使用subprocess模块,祝你编程愉快!
subprocess.run() >>>subprocess.run(["ls","-l"])# doesn't capture outputCompletedProcess(args=['ls','-l'], returncode=0)>>>subprocess.run("exit 1", shell=True, check=True) Traceback (most recent call last): ... subprocess.CalledProcessError: Command'exit 1'returned non-zero exit...
import subprocess result = subprocess.run(['ls', '-l'], capture_output=True, text=True) if result.returncode == 0: print("命令执行成功") else: print(f"命令执行失败,错误代码:{result.returncode}") print(f"错误信息:{result.stderr}") 复制代码 在这个示例中,我们使用subprocess.run()执行...
把subprocess.Popen() 换为os.system()后前后台都是正常的。 继续查subprocess.Popen() ,把命令行换成 "exit 1", 循环调用10,还有不一致的returncode。前面6次为1,后面4次为0。 后面把subprocess.Popen()换为subprocess.call(),经测试前后台也是正常的。查看了subprocess的源代码,subprocess.call()就是subproc...
importsubprocess# 定义要执行的命令command=["echo","Hello, World!"]try:# 执行命令result=subprocess.run(command,capture_output=True,text=True,check=True)# 获取返回值和输出return_code=result.returncode output=result.stdout error=result.stderrprint(f"Return Code:{return_code}")print(f"Output:{out...