No module named pip error if username in Windows consist of cyrillic symbols

[valiaafo]

Describe the bug

Opening this ticket because I think it could help others.
Fatal error from pip prevented installation when I try to install pycowsay:

and json.decoder.JSONDecodeError when I try to install .whl files:

But if the user's profile name consists of only Latin symbols, all installations are successful.
In my opinion, it is because pipx uses temporary files but TMP and TEMP environment variables include user's profile name in invalid encoding (as in Figure 1) if it is Cyrillic (maybe it can be reproduced for other cases when the user profile name includes non-Latin symbols).

The bag was reproduced in Windows 10 and Windows 8.1.
Python 3.9.9, pipx 0.16.4

How to reproduce

Example with verbose:

Expected behavior

Warnings or caught exceptions for cases when user profile name includes non-Latin symbols because it is really difficult to understand why the library is still not installed using pipx, because the errors the installation crashes at the moment are extremely uninformative.

[uranusjr]

This may have been fixed in #811. Can you upgrade pipx and see if the problem still persists?

[cs01]

I unfortunately never released a new version of pipx with the fix, but I think that would indeed fix this issue.

[valiaafo]

Unfortuantely, the problem still persists.

[dukecat0]

Unfortuantely, the problem still persists.

What's the output of pipx --version?

[qux-bbb]

Still have the error.
My computer username is "张三"

C:\Users\张三>pipx install pycowsay
Fatal error from pip prevented installation. Full pip output in file:
    C:\Users\张三\.local\pipx\logs\cmd_2023-10-27_23.43.03_pip_errors.log

Error installing pycowsay.

C:\Users\张三>pipx --version
1.2.1

The C:\Users\张三.local\pipx\logs\cmd_2023-10-27_23.43.03_pip_errors.log

PIP STDOUT
----------

PIP STDERR
----------
C:\Users\张三\.local\pipx\venvs\pycowsay\Scripts\python.exe: No module named pip

[gaborbernat]

PR welcome.