How to get the output of subprocess.check_output() python module?

Question

I'm trying to get information from a Command Prompt (CMD - Windows ) in python, using the module subprocess like this :

ipconfig = subprocess.check_output("ipconfig")
print(ipconfig)

The result is:

b'\r\nWindows IP Configuration\r\n\r\n\r\nEthernet adapter Local Area Connect:\r\n\r\n   Connection-specific DNS Suffix  . : XX.XXX\r\n   IPv4 address. . . . . . . . . . . : XXXXXXXXX\r\n   Subnet Mask . . . . . . . . . . . : XXXXXXXXXX\r\n   Default Gateway . . . . . . . . . : XXXXXX\r\n'

I've read the documentation on module subprocess but I didn't find anything that fits my problem.

I need this information in a nice formatted string ... not like that, what could I do?

(I Think the problem here is a string format, but if you have tips for getting a nice output without needing of string formatting, I appreciate)

I know that I can get IP address with socket module, but I'm just giving an example.

What kind of "nice formatting" do you want? What you have there is the literal output of ipconfig, which is formatted, to start with... — Ricardo Cárdenes
– Ricardo Cárdenes, Commented Jan 31, 2014 at 17:51
The one which @martijn answered, the 'real' result of prompt. — Stephenloky
– Stephenloky, Commented Jan 31, 2014 at 18:16

Martijn Pieters · Accepted Answer · 2014-01-31 17:50:59Z

9

You are printing a bytes string value, and print() turned that into a unicode string using repr(). You want to decode the value to unicode instead:

import sys

print(ipconfig.decode(sys.stdout.encoding))

This uses the encoding of the console to interpret the command output.

answered Jan 31, 2014 at 17:50

Martijn Pieters

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3 Comments

Stephenloky Over a year ago

Wow! That works perfectly, I will stude the decode,stdout,encoding methods ... Thank you very much

Kentzo Over a year ago

Why did you prefer sys.stdout.encoding over sys.getfilesystemencoding() ? sys.stdout can be None in some cases.

Martijn Pieters Over a year ago

@Kentzo: sys.getfilesystemencoding() is the wrong codec; your file system and your terminal do not have to use the same encoding..

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