python subprocess encoding

Question

I'm trying to store the output of powershell in a var:

import subprocess subprocess.check_call("powershell \"Get-ChildItem -LiteralPath 'HKLM:SOFTWARE\\\\Microsoft\\\\Windows\\\\CurrentVersion\\\\Uninstall' -ErrorAction 'Stop' -ErrorVariable '+ErrorUninstallKeyPath'\"", shell=True, stderr=subprocess.STDOUT)

this way, using check_call, it prints ok, for example:

DisplayName : Skype™

but this way it only prints to screen, so i have to use

import subprocess output = subprocess.check_output("powershell \"Get-ChildItem -LiteralPath 'HKLM:SOFTWARE\\\\Microsoft\\\\Windows\\\\CurrentVersion\\\\Uninstall' -ErrorAction 'Stop' -ErrorVariable '+ErrorUninstallKeyPath'\"", shell=True, stderr=subprocess.STDOUT)

but then, using check_output, i get:

DisplayName : SkypeT

how can i work around this?

r3v3r53 · Accepted Answer · 2018-04-03 13:02:15Z

Following this post instructions:How to make Unicode charset in cmd.exe by default?

Its possible to bypass this encoding problem

import subprocess output = subprocess.check_output("chcp 65001 | powershell \"Get-ChildItem -LiteralPath 'HKLM:SOFTWARE\\\\Microsoft\\\\Windows\\\\CurrentVersion\\\\Uninstall' -ErrorAction 'Stop' -ErrorVariable '+ErrorUninstallKeyPath'\"", shell=True, stderr=subprocess.STDOUT)

why do you transfer output of chcp to powershell? maybe you meant && instead of | ?

Edwin van Mierlo · Accepted Answer · 2018-03-07 11:45:44Z

The output is a of type bytes so you need to either decode it to a string with .decode('utf-8') (or with whatever codec you want), or use str(), Example:

import subprocess output_bytes = subprocess.check_output("powershell \"Get-ChildItem -LiteralPath 'HKLM:SOFTWARE\\\\Microsoft\\\\Windows\\\\CurrentVersion\\\\Uninstall' -ErrorAction 'Stop' -ErrorVariable '+ErrorUninstallKeyPath'\"", shell=True, stderr=subprocess.STDOUT) output_string = str(output_bytes) # alternatively # output_string = output_bytes.decode('utf-8') # there are lots of \r\n in the output I encounterd, so you can split # to get a list output_list = output_string.split(r'\r\n') # once you have a list, you can loop thru and print (or whatever you want) for e in output_list: print(e)

The key here is to decode to whatever codec you want to use in order to produce the correct character when printing.

Hello, thank you for your reply, but the result was the same... I managed to solve it following this post: link i'm posting an anwser with the correct code
You can also set text=True to obtain results as str instead of bytes, or encoding='utf-8' to set a specific encoding.

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