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bpo-45382: test.pythoninfo: set wmic.exe encoding to OEM by vstinner · Pull Request #30890 · python/cpython · GitHub

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bpo-45382: test.pythoninfo: set wmic.exe encoding to OEM #30890

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Merged
vstinner merged 1 commit into from
Jan 25, 2022
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bpo-45382: test.pythoninfo: set wmic.exe encoding to OEM #30890

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3 changes: 3 additions & 0 deletions Lib/test/pythoninfo.py
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Original file line number Diff line number Diff line change
Expand Up @@ -731,9 +731,12 @@ def collect_windows(info_add):

import subprocess
try:
# When wmic.exe output is redirected to a pipe,
# it uses the OEM code page
proc = subprocess.Popen(["wmic", "os", "get", "Caption,Version", "/value"],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
encoding="oem",
Comment on lines +734 to +739

eryksun Jan 25, 2022

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

Some of Microsoft's tools support formatting output as XML or JSON, which can generally be parsed more reliably. For example:

import subprocess
import xml.etree.ElementTree as ET

p = subprocess.run('wmic.exe os get Caption,Version /format:rawxml', 
        capture_output=True, encoding='oem')
root = ET.fromstring(p.stdout)
caption = root.find('.//PROPERTY[@NAME="Caption"]/VALUE').text
version = root.find('.//PROPERTY[@NAME="Version"]/VALUE').text

vstinner Jan 25, 2022

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

Please propose a PR if you prefer to parse XML than plain text. I don't want to invest too much time in this code, since I'm not using Windows :-)

vstinner Jan 25, 2022

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

Well, maybe a more "correct" implementation is required if the function enters the stdlib platform module, but this PR is only about test.pythoninfo which is only used ... for tests ;-)
text=True)
output, stderr = proc.communicate()
if proc.returncode:
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