子流程引发CalledProcessError异常时检查命令的返回码

子流程引发CalledProcessError异常时检查命令的返回码

要同时获取过程输出和返回的代码：

from subprocess import Popen, PIPEp = Popen(["ls", "non existent"], stdout=PIPE)output = p.communicate()[0]print(p.returnpre)

subprocess.CalledProcessError

是一类。要访问，请

returnpre

使用异常实例：

from subprocess import CalledProcessError, check_outputtry:    output = check_output(["ls", "non existent"])    returnpre = 0except CalledProcessError as e:    output = e.output    returnpre = e.returnpreprint(returnpre)