如何，如果我在Python

Question

使用子我使用子這樣

args = ['commandname', 'some args'] 
subprocess.check_output(args) 

我可以顯示錯誤有時我得到這個錯誤

command returned non-zero exit status 1

有沒有什麼辦法，如果得到非零退出狀態，則系統通過該消息提出異常，如

output = subprocess.check_output(args) 
if non zero exit : 
    raise Exception(errormessage) 

Answer 1

Y您可以同時使用subprocess屬性稱爲returncode[docs]

Popen.returncode 
    The child return code, set by poll() and wait() (and indirectly by communicate()). 
    A None value indicates that the process hasn’t terminated yet. 

    A negative value -N indicates that the child was terminated by signal N (Unix only). 

因此，它應該工作是這樣的（未測試代碼） -

import subprocess 
args = ['commandname', 'some args'] 
child = subprocess.Popen(args, stdout=subprocess.PIPE) 
streamdata = child.communicate()[0] 
returncode = child.returncode 
if returncode != 0: 
    raise Exception