Get exit status of last command in Python script

Question

How can I get the exist status (if command succeed or not) of any line in Python?

For example in bash, $? will tell me the last exist status of any command. I need it to know if my connection to FTP server was successful or not.

No, there's no such concept. All you can get is the return value from a function. How are you connecting to the FTP server? Are you using ftplib? Also, add your code. — mhawke
– mhawke, Commented Jun 16, 2015 at 8:04
Python is not Bash. Calling functions or methods of classes does not cause an exit status to be set. It may return a value or throw an exception. But there is nothing like $? in Bash. If you want to use ftplib, read the documentation. There are various exceptions described there. — user1907906
– user1907906, Commented Jun 16, 2015 at 8:05

Jorge · Accepted Answer · 2018-09-17 15:36:40Z

1

Have you tried using a try/catch? If there was an error while executing the command, an exception will be raised. You can retrieve it with the sys module.

Example code:

import sys 

try:
    run_command()
except:
    e = sys.exc_info()[0]
    print(e)

answered Sep 17, 2018 at 15:36

Jorge

661 silver badge10 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

user3696412 · Accepted Answer · 2015-06-16 08:02:54Z

0

If it is a function you call, it should have a retrun code you can collect like

retVal = doSomething()

Then you can check what happened.

answered Jun 16, 2015 at 8:02

user3696412

1,4593 gold badges17 silver badges39 bronze badges

Collectives™ on Stack Overflow

Get exit status of last command in Python script

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related