Question

我正在研究异常和错误的退出代码，但我的终端没有在Windows 10的Python 3.8中给我退出代码。

例如，我希望能够从简单的“ hello world” 程序中获取消息“退出代码为0的过程已完成” 。

Answer 1

已编辑答案：练习中必须有一些未处理的异常/错误，以使它不会以退出代码0 退出（表示成功执行了练习）。在程序的开头添加Try，并在示例程序的末尾捕获异常。

print（）函数始终返回None，所以不要尝试从print（）获取返回状态

import sys

try:
    print('hello world')                      #print('string') - Always returns None
    print("Process finished with exit code 0")
    sys.exit(0)
except Exception as ex:
    print("Error:"+ex)
    sys.exit(1)

Answer 2

享受这个完整的说明演示。

import subprocess


result = subprocess.run("C:/Windows/System32/WindowsPowerShell/v1.0/powershell.exe Write-Output 'Hello world!' ", shell=True, capture_output=True) # command to run in powershell using python subprocess module

res = result.returncode # return system-exit code of the command

out = result.stdout # return output of the powershell command


print(f"The output of the command is {out}, The exit code is {res} and the process generated by command is {result}.")

输出

The output of the command is b'Hello world!\r\n', The exit code is 0 and the process generated by command is CompletedProcess(args="C:/Windows/System32/WindowsPowerShell/v1.0/powershell.exe Write-Output 'Hello world!' ", returncode=0, stdout=b'Hello world!\r\n', stderr=b'').

如何在Python中获得退出代码？

2 个答案: