[Windows 10] When using Python 3.12 psutil.disk_usage is raising an error not seen on other Python versions

[PySimpleGUI]

Summary

• OS: Windows 10
• Architecture: 64-bit
• Psutil version: 5.9.5
• Python version: 3.12.0a7
• Type: core?

Description

This is only happening on Python 3.12A. No other versions of Python are showing this problem (I've tried them all from 3.6-3.11 including PyPy as well). All drives that I try to get usage data from get this error. This is the line of code I'm trying to run:

usage = psutil.disk_usage(mount)

The mount parm I'm passing in has these values that all fail. The string is actually 'A:\\' but prints as:

A:\
B:\
C:\
D:\
E:\
F:\
G:\
H:\
I:\
J:\
X:\
Y:\
Z:\

It doesn't make sense that the code would work on so many other versions of Python. I'm coming up with blanks so thought I would ask here...

THANK YOU for a fantastic package. psutil has been a huge part of my projects and provides constant feedback all day about my system. From a detailed look at each core to the overall CPU and RAM used, your work enables it all.

[giampaolo]

Hi Mike!

All drives that I try to get usage data from get this error.

What error? I don't see any. Perhaps you forgot to paste it?

[PySimpleGUI]

I DID forget to paste it! Doh!

argument 1 (impossible<bad format char>)

[giampaolo]

Don't you have a full python traceback message? I'm not sure where that line is coming from, but it's not psutil.

[PySimpleGUI]

Lemme remove the try and see if I can get more info for you. Sorry about it being so brief. I'll try again, so to speak....

[PySimpleGUI]

Let's see if this is better. I hardcoded a call to:

    usage = psutil.disk_usage('A:\\')

  File "C:\Python\PycharmProjects\PSG\MikesDemos\Mike_Desktop_Widget_Drive_Usage.py", line 191, in <module>
    main(location)
  File "C:\Python\PycharmProjects\PSG\MikesDemos\Mike_Desktop_Widget_Drive_Usage.py", line 154, in main
    update_window(window)  # sets the progress bars
    ^^^^^^^^^^^^^^^^^^^^^
  File "C:\Python\PycharmProjects\PSG\MikesDemos\Mike_Desktop_Widget_Drive_Usage.py", line 89, in update_window
    usage = psutil.disk_usage('A:\\')
            ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "X:\Python\python3.12\Lib\site-packages\psutil\__init__.py", line 2005, in disk_usage
    return _psplatform.disk_usage(path)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "X:\Python\python3.12\Lib\site-packages\psutil\_pswindows.py", line 280, in disk_usage
    total, free = cext.disk_usage(path)
                  ^^^^^^^^^^^^^^^^^^^^^
SystemError: argument 1 (impossible<bad format char>)

Process finished with exit code 1

[PySimpleGUI]

Here's a 2 line replication I managed to get using REPL:

C:\Python\PycharmProjects\PSG>py312
Python 3.12.0a7 (tags/v3.12.0a7:b861ba4, Apr  4 2023, 16:33:41) [MSC v.1934 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import psutil
>>> psutil.disk_usage('A:\\')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "X:\Python\Python3.12\Lib\site-packages\psutil\__init__.py", line 2005, in disk_usage
    return _psplatform.disk_usage(path)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "X:\Python\Python3.12\Lib\site-packages\psutil\_pswindows.py", line 280, in disk_usage
    total, free = cext.disk_usage(path)
                  ^^^^^^^^^^^^^^^^^^^^^
SystemError: argument 1 (impossible<bad format char>)
>>>

[giampaolo]

Well, that's weird. Looks like a Python 3.12 bug.

[PySimpleGUI]

Thank you for the super-fast work on this one! That's the conclusion I came to as well since your stuff is rock solid on all the testing I've been doing, on all versions of Python 3.6-3.11. Only 3.12 has this.

[mayeut]

This is related to the warning seen in #2255
c.f. https://docs.python.org/3.11/c-api/arg.html

u (str) [const Py_UNICODE *]
Convert a Python Unicode object to a C pointer to a NUL-terminated buffer of Unicode characters. You must pass the address of a Py_UNICODE pointer variable, which will be filled with the pointer to an existing Unicode buffer. Please note that the width of a Py_UNICODE character depends on compilation options (it is either 16 or 32 bits). The Python string must not contain embedded null code points; if it does, a ValueError exception is raised.
Changed in version 3.5: Previously, TypeError was raised when embedded null code points were encountered in the Python string.
Deprecated since version 3.3, will be removed in version 3.12: Part of the old-style Py_UNICODE API; please migrate to using PyUnicode_AsWideCharString().